[Event "Caracas zt"]
[Site "Caracas"]
[Date "1954.??.??"]
[Round "?"]
[White "De Lara, L."]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "C35"]
[PlyCount "52"]
[EventDate "1954.??.??"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "VEN"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]

1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Nf6 5. d3 d5 6. exd5 Nxd5 7. O-O O-O 8.
Nc3 c6 9. Bxd5 cxd5 10. Bxf4 Nc6 11. d4 Bg4 12. Ne2 Qb6 13. c3 Qxb2 14. Rb1
Qxa2 15. Rxb7 Qa6 16. Rb2 Rfe8 17. Ng3 Qc4 18. h3 Qxc3 19. Rc2 Bxf3 20. Rxc3
Bxd1 21. Rxc6 Ba4 22. Rc7 Bf6 23. Be5 Rxe5 24. dxe5 Bxe5 25. Re7 Bxg3 26. Rfxf7
Be5 0-1

[Event "Amsterdam ol (Men) qual-D"]
[Site "Amsterdam"]
[Date "1954.09.04"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Kluger, Gyula"]
[Result "0-1"]
[ECO "E49"]
[WhiteElo "2370"]
[PlyCount "86"]
[EventDate "1954.09.04"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Hungary"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "HUN"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. a3 Bxc3+ 7. bxc3 d5 8.
cxd5 exd5 9. Ne2 b6 10. O-O Ba6 11. Bxa6 Nxa6 12. Qd3 c4 13. Qc2 Nb8 14. f3 Re8
15. Ng3 Nc6 16. Qf2 Qd7 17. Ra2 b5 18. Re2 a5 19. e4 dxe4 20. fxe4 b4 21. d5
Ne5 22. Qd4 bxc3 23. Qd3 Qc8 24. Be3 Nfd7 25. Bd4 g6 26. Ref2 Qd8 27. Rb2 Qc8
28. Rb5 Qa6 29. a4 f6 30. Rfb1 Kh8 31. Kh1 Kg8 32. Bxe5 Nxe5 33. Rb6 Qa7 34.
Rxf6 Ng4 35. Rfb6 Nf2+ 36. Kg1 Nxe4 37. Qxc4 Nd2 38. Qa2 Nxb1 39. d6+ Kf8 40.
Qf2+ Qf7 41. Rxb1 Qxf2+ 42. Kxf2 Rad8 43. Rb6 Re6 0-1

[Event "Amsterdam ol (Men) qual-D"]
[Site "Amsterdam"]
[Date "1954.09.05"]
[Round "2"]
[White "Philippe, Georges"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A00"]
[BlackElo "2370"]
[PlyCount "79"]
[EventDate "1954.09.04"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Luxembourg"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "LUX"]
[BlackTeamCountry "COL"]

1. Nf3 d5 2. b4 a5 3. bxa5 Rxa5 4. e3 Nf6 5. d4 Bf5 6. Bd2 Ra7 7. Nh4 Bg6 8.
Nxg6 hxg6 9. Bd3 e6 10. O-O Bd6 11. f4 Nbd7 12. Nc3 c6 13. Qf3 Bb4 14. Be1 Qa5
15. Ne2 Bxe1 16. Rfxe1 b5 17. Ng3 Nb6 18. e4 Qb4 19. exd5 Qxd4+ 20. Kh1 Nbxd5
21. f5 Ng4 22. h3 Nf2+ 23. Kh2 Ng4+ 24. Kh1 Nf2+ 25. Kh2 Nxd3 26. cxd3 gxf5 27.
Nxf5 Qf4+ 28. Qxf4 Nxf4 29. d4 g6 30. Ne3 Ra4 31. Nc2 Rc4 32. Re4 Nxg2 33. Kxg2
Rxc2+ 34. Kg1 Rxh3 35. a4 Rhc3 36. a5 Rc1+ 37. Re1 Rxe1+ 38. Rxe1 Ra3 39. Rc1
Kd7 40. Kf1 0-1

[Event "Amsterdam ol (Men) qual-D"]
[Site "Amsterdam"]
[Date "1954.09.06"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Schmid, Lothar"]
[Result "1-0"]
[ECO "B81"]
[WhiteElo "2370"]
[PlyCount "96"]
[EventDate "1954.09.04"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Germany"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "GER"]

1. d4 c5 2. e4 cxd4 3. Nf3 e6 4. Nxd4 Nf6 5. Nc3 d6 6. g4 Nc6 7. g5 Nd7 8. Bg2
Be7 9. h4 Nb6 10. a4 a6 11. a5 Nc4 12. Nxc6 bxc6 13. Qd4 Ne5 14. b4 f6 15. f4
Nf7 16. Na4 e5 17. Qc3 Bb7 18. Nb6 Rb8 19. Bh3 O-O 20. Be6 Re8 21. f5 fxg5 22.
hxg5 Bxg5 23. Qh3 h6 24. Qh5 Rxe6 25. fxe6 Nh8 26. Bxg5 Qxg5 27. Qxg5 hxg5 28.
O-O-O d5 29. Nd7 Re8 30. Nc5 Bc8 31. exd5 cxd5 32. Rxd5 Ng6 33. Rg1 Bxe6 34.
Nxe6 Rxe6 35. Rxg5 e4 36. b5 e3 37. Rg1 Nf4 38. Rd8+ Kf7 39. Kd1 axb5 40. Rd7+
Kf6 41. Rgxg7 Re4 42. Rdf7+ Ke5 43. Re7+ Ne6 44. a6 Ra4 45. a7 Kd6 46. Rd7+ Kc6
47. Rgf7 Nf4 48. Ke1 e2 1-0

[Event "Amsterdam ol (Men) qual-D"]
[Site "Amsterdam"]
[Date "1954.09.08"]
[Round "5"]
[White "Dunkelblum, Arthur"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D38"]
[BlackElo "2370"]
[PlyCount "101"]
[EventDate "1954.09.04"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Belgium"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "BEL"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Bb4 5. cxd5 exd5 6. Qa4+ Nc6 7. Bg5 h6 8.
Bxf6 Qxf6 9. e3 O-O 10. Be2 Be6 11. O-O a6 12. Rfc1 Bd6 13. Qd1 Ne7 14. Qd2
Rae8 15. Na4 g5 16. Nc5 Bc8 17. Rc3 Nf5 18. Nd3 Qg7 19. Qd1 g4 20. Nfe1 h5 21.
g3 h4 22. Nf4 hxg3 23. hxg3 Bxf4 24. gxf4 g3 25. Bf3 gxf2+ 26. Kxf2 Qg3+ 27.
Ke2 Qxf4 28. Nc2 Qh2+ 29. Kd3 c6 30. Qg1+ Qxg1 31. Rxg1+ Ng7 32. Kd2 Bf5 33.
Ne1 Re6 34. Ng2 Rh6 35. Rcc1 Rh7 36. Rh1 Rxh1 37. Rxh1 Re8 38. Rh4 Ne6 39. Rh5
Bg6 40. Re5 f6 41. Rxe6 Rxe6 42. Nf4 Kf7 43. Nxe6 Kxe6 44. b4 Kf5 45. a4 Kg5
46. a5 Bh5 47. Bg2 Kh4 48. Bf1 Bf3 49. Bd3 Be4 50. Be2 f5 51. Bd1 1/2-1/2

[Event "Amsterdam ol (Men) qual-D"]
[Site "Amsterdam"]
[Date "1954.09.09"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Bhend, Edwin"]
[Result "1-0"]
[ECO "A98"]
[WhiteElo "2370"]
[BlackElo "2325"]
[PlyCount "61"]
[EventDate "1954.09.04"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Switzerland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "SUI"]

1. d4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. c4 d6 7. Nc3 Qe8 8. Qc2
Qh5 9. e3 Bd7 10. b4 Bc6 11. d5 exd5 12. cxd5 Bxd5 13. Nxd5 Nxd5 14. Qb3 c6 15.
Nd4 Qf7 16. b5 Nb6 17. Nxf5 Bf6 18. Rb1 d5 19. Ba3 Rd8 20. Rfd1 Nc4 21. e4 dxe4
22. Be7 Nd7 23. Bxd8 Rxd8 24. bxc6 bxc6 25. Bxe4 Ndb6 26. Rxd8+ Bxd8 27. Rd1
Bc7 28. Qb4 Qh5 29. Rd4 c5 30. Qxc5 Qf7 31. Rxc4 1-0

[Event "Amsterdam ol (Men) qual-D"]
[Site "Amsterdam"]
[Date "1954.09.11"]
[Round "7"]
[White "Penrose, Jonathan"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C76"]
[BlackElo "2370"]
[PlyCount "81"]
[EventDate "1954.09.04"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "England"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "ENG"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 g6 7. O-O Bg7 8. Re1
Nge7 9. dxe5 Nxe5 10. Nxe5 Bxe5 11. Bc2 O-O 12. Bg5 Bg7 13. Nd2 h6 14. Bh4 g5
15. Bg3 Ng6 16. Nf1 Be5 17. Ne3 Nf4 18. Qd2 Qf6 19. Bxf4 Bxf4 20. Nd5 Qe5 21.
Qd4 Be6 22. Nxc7 Rac8 23. Nxe6 fxe6 24. Bb3 Rf6 25. g3 Qxd4 26. cxd4 Bd2 27.
Red1 Ba5 28. e5 Rg6 29. d5 dxe5 30. dxe6 Kf8 31. Rd7 Rg7 32. Rad1 Rxd7 33. exd7
Rd8 34. Be6 Ke7 35. Bf5 Bb4 36. f3 Bc5+ 37. Kf1 Bd6 38. Rc1 Kf6 39. Rc8 Ke7 40.
Ke2 Bb4 41. Kd3 1-0

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.12"]
[Round "1"]
[White "Anderson, Frank Ross"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C73"]
[BlackElo "2370"]
[PlyCount "86"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Canada"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "CAN"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f6 7. c4 g6 8. Nc3
Nh6 9. Qa4 Bd7 10. c5 Nf7 11. O-O dxc5 12. dxe5 fxe5 13. Be3 Bd6 14. Qc4 Qe7
15. Na4 Be6 16. Qc2 c4 17. Nd2 O-O 18. Nxc4 Rab8 19. Na5 Nd8 20. a3 Bd7 21. Nc5
Rb5 22. b4 Bc8 23. Rfd1 Qf6 24. Ncb3 Be6 25. Rd2 Qf7 26. Rb1 Bxb3 27. Rxb3 Ne6
28. Nxc6 a5 29. Nxa5 Nd4 30. Bxd4 exd4 31. Qc4 Rh5 32. Qxf7+ Rxf7 33. g3 c5 34.
Nc4 Rd7 35. b5 Bb8 36. a4 Re7 37. f3 g5 38. Re2 Rh6 39. a5 Rhe6 40. b6 g4 41.
fxg4 Rxe4 42. Rxe4 Rxe4 43. a6 Re2 1-0

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.13"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Philippe, Georges"]
[Result "1-0"]
[ECO "B11"]
[WhiteElo "2370"]
[PlyCount "77"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Luxembourg"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "LUX"]

1. e4 c6 2. Nf3 d5 3. Nc3 Bg4 4. h3 Bxf3 5. Qxf3 Nf6 6. d3 e6 7. g4 Bb4 8. Bg2
d4 9. a3 Qa5 10. axb4 Qxa1 11. Ne2 Nbd7 12. O-O Qa4 13. g5 Ng8 14. Nxd4 Qxb4
15. c3 Qe7 16. Bf4 g6 17. e5 Qc5 18. Nb3 Qb5 19. Qd1 Ne7 20. Qc2 Nc5 21. Nxc5
Qxc5 22. b4 Qb6 23. Be3 Qc7 24. Bc5 Nf5 25. Qa4 a6 26. d4 b5 27. Qc2 h6 28.
gxh6 Rxh6 29. c4 Rd8 30. Qe4 Rc8 31. cxb5 axb5 32. Ra1 Rh4 33. f4 Qb8 34. Ra6
g5 35. Qb1 Rxf4 36. Rxc6 Rxc6 37. Bxc6+ Kd8 38. Qa1 Qc7 39. Qa8+ 1-0

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.15"]
[Round "4"]
[White "Raizman, Maurice"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E29"]
[BlackElo "2370"]
[PlyCount "63"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "France"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. a3 Bxc3+ 6. bxc3 O-O 7. Bd3 Nc6 8.
Ne2 b6 9. O-O Ba6 10. Ng3 Na5 11. Qe2 d6 12. Bb2 Rc8 13. Rac1 Qd7 14. e4 Qa4
15. e5 dxe5 16. dxe5 Ne8 17. Ne4 Bxc4 18. Ng5 g6 19. Qg4 Kg7 20. Rce1 Qb5 21.
Bxc4 Qxc4 22. Re4 Qb3 23. Bc1 h6 24. Nh3 f5 25. Bxh6+ Kxh6 26. Qg5+ Kg7 27. Rh4
Nc6 28. Qh6+ Kf7 29. Qh7+ Ng7 30. Ng5+ Ke8 31. Qxg7 Ne7 32. Nh7 1-0

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.17"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Lorson, Gerhard"]
[Result "1-0"]
[ECO "E41"]
[WhiteElo "2370"]
[PlyCount "84"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Saarland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Bxc3+ 6. bxc3 b6 7. e4 Bb7 8. f3
d6 9. Ne2 O-O 10. Bg5 Nbd7 11. O-O h6 12. Be3 e5 13. d5 Ne8 14. Ng3 Ndf6 15. f4
Bc8 16. h3 Kh7 17. Bc2 Ng8 18. Ba4 Ne7 19. fxe5 dxe5 20. Bxe8 Qxe8 21. a4 Bd7
22. a5 Rb8 23. axb6 axb6 24. Qb3 Qc8 25. Ra7 Kg8 26. Rfa1 f5 27. d6 Nc6 28. Rc7
Na5 29. Qd1 Qe8 30. Qd5+ Be6 31. Qxe5 Rf7 32. Rxf7 Qxf7 33. exf5 Bd7 34. Qf4
Re8 35. Bf2 Nxc4 36. Ra7 g5 37. Qf3 Ne5 38. Qh5 Rd8 39. Qxh6 Qg7 40. Qxg7+ Kxg7
41. Be3 Nf7 42. Ne4 Kf8 1-0

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.18"]
[Round "6"]
[White "Porreca, Giorgio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E65"]
[BlackElo "2370"]
[PlyCount "211"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Italy"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "ITA"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 d6 3. Nf3 g6 4. Nc3 Bg7 5. g3 O-O 6. Bg2 Na6 7. O-O c5 8. h3
Bd7 9. Kh2 Bc6 10. d5 Bd7 11. e4 Nc7 12. a4 b6 13. Nd2 Nfe8 14. f4 f5 15. Nf3
fxe4 16. Ng5 Nf6 17. Ncxe4 Rc8 18. Qe2 Qe8 19. g4 h6 20. Nf3 Nxe4 21. Qxe4 e6
22. dxe6 Bc6 23. Qd3 Nxe6 24. Re1 Qf7 25. f5 gxf5 26. g5 hxg5 27. Nxg5 Nxg5 28.
Bxc6 Rxc6 29. Bxg5 Be5+ 30. Kh1 Rcc8 31. Bh6 Qb7+ 32. Kg1 Rf6 33. Bg5 Rf7 34.
Re2 Rcf8 35. Rf1 Kh8 36. Bf4 Rg8+ 37. Kh2 Rfg7 38. Qd5 Qxd5 39. cxd5 Bxf4+ 40.
Rxf4 Rg5 41. Ref2 Rf8 42. h4 Rh5 43. Re2 Kg7 44. Re6 Rf6 45. Re7+ Rf7 46. Re6
Rh6 47. Re3 Kf8 48. Kh3 Rhf6 49. Ref3 Kg7 50. Rf1 Re7 51. Rxf5 Rxf5 52. Rxf5
Re4 53. Rg5+ Kf6 54. Rg8 Rxa4 55. Re8 Rb4 56. Re6+ Kf5 57. Rxd6 Rb3+ 58. Kg2
Rxb2+ 59. Kg3 Rb3+ 60. Kg2 Ke5 61. Rd7 Rd3 62. h5 Kf4 63. h6 Rg3+ 64. Kh2 Rg6
65. h7 Rh6+ 66. Kg2 Ke5 67. Kf3 c4 68. Ke3 Rh3+ 69. Kd2 b5 70. Kc2 a6 71. Kb2
b4 72. d6 a5 73. Rc7 Rh2+ 74. Kb1 Kxd6 75. Rxc4 Rxh7 76. Rc8 Rc7 77. Ra8 Rc5
78. Kb2 Kc6 79. Rb8 Kc7 80. Rh8 Kb6 81. Rb8+ Ka6 82. Kb3 Rc3+ 83. Kb2 Rh3 84.
Ka2 Rh5 85. Kb3 Ka7 86. Rg8 Kb6 87. Rb8+ Kc5 88. Rc8+ Kd4 89. Rd8+ Rd5 90. Rh8
Kd3 91. Ra8 Kd2 92. Kb2 Kd1 93. Ra7 Rd2+ 94. Kb1 Rd3 95. Kb2 Ra3 96. Rh7 a4 97.
Rh1+ Ke2 98. Rh2+ Kf1 99. Rh4 Rb3+ 100. Ka2 Kf2 101. Rg4 Kf3 102. Rh4 Ke2 103.
Rh2+ Kd3 104. Rh3+ Kc4 105. Rxb3 axb3+ 106. Kb2 1/2-1/2

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.19"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Nielsen, Axel Jorgen"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2370"]
[PlyCount "83"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "DEN"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Bd3 Nc6 5. O-O Bg4 6. h3 Bh5 7. Bc2 e6 8. d3
Be7 9. Re1 O-O 10. Nbd2 Qc7 11. g4 Bg6 12. Nf1 d5 13. Ng3 Rfd8 14. Qe2 b5 15.
Nh4 Bd6 16. Kg2 d4 17. Nf3 Nd7 18. Qf1 Nb6 19. Ne2 dxc3 20. bxc3 b4 21. Be3
bxc3 22. Nxc3 a6 23. Rac1 Rac8 24. Na4 Nxa4 25. Bxa4 Qa5 26. Bb3 Be7 27. Nd2
Nd4 28. Bc4 h6 29. Nb3 Qa4 30. Red1 Kh8 31. Qe1 Rb8 32. Rd2 e5 33. f3 f6 34.
Rb2 Rb6 35. Rcb1 Rdb8 36. Qc1 Bh7 37. Nxd4 Rxb2+ 38. Rxb2 Rd8 39. Nf5 Bf8 40.
Qb1 Bg8 41. Bxg8 Kxg8 42. Rb7 1-0

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.20"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Reilly, Brian Patrick"]
[Result "1-0"]
[ECO "B17"]
[WhiteElo "2370"]
[PlyCount "55"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "IRL"]

1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bxf3 5. Qxf3 dxe4 6. Nxe4 e6 7. Bc4 Nf6 8.
O-O Nbd7 9. d4 Be7 10. c3 Nxe4 11. Qxe4 Nf6 12. Qf3 O-O 13. Re1 Qc7 14. Bf4 Bd6
15. Bg5 Nd7 16. Re4 Rfe8 17. Rae1 Nf8 18. Qh5 Be7 19. Bf4 Bd6 20. Bc1 Red8 21.
Rg4 Rd7 22. f4 Rad8 23. f5 exf5 24. Qxf5 Re7 25. Rf1 Qd7 26. Rxg7+ Kxg7 27.
Qf6+ Kg8 28. Bh6 1-0

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.21"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Dunkelblum, Arthur"]
[Result "1/2-1/2"]
[ECO "B14"]
[WhiteElo "2370"]
[PlyCount "57"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Belgium"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "BEL"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 cxd4 8.
exd4 g6 9. Bg5 Qa5 10. O-O Bg7 11. Be4 O-O 12. Qd2 Nxc3 13. bxc3 Qc7 14. Rac1
b6 15. c4 Bb7 16. d5 Na5 17. d6 Qd7 18. Bxb7 Nxb7 19. Be7 Rfc8 20. Rfd1 Rc5 21.
Qd4 e5 22. Qh4 h6 23. Nd2 f5 24. Nb3 Rc6 25. c5 e4 26. Qg3 bxc5 27. Qxg6 Qxe7
28. dxe7 Rxg6 29. Rd7 1/2-1/2

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.22"]
[Round "10"]
[White "Katajisto, Olavi"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A52"]
[BlackElo "2370"]
[PlyCount "49"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Finland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FIN"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 d6 5. Be2 Nxe5 6. f4 Ng6 7. Nf3 Nc6 8. O-O
Be7 9. Nc3 O-O 10. Be3 Re8 11. Qd2 Bf6 12. Nd4 Bd7 13. Rae1 Nxd4 14. Bxd4 Bc6
15. Bd1 a5 16. Nd5 Bxd4+ 17. Qxd4 Bxd5 18. cxd5 f6 19. Bh5 Re7 20. Bxg6 hxg6
21. e5 dxe5 22. fxe5 Rxe5 23. Rxe5 fxe5 24. Qxe5 Ra6 25. h3 1/2-1/2

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.23"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Beni, Alfred"]
[Result "0-1"]
[ECO "E49"]
[WhiteElo "2370"]
[PlyCount "80"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Austria"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "AUT"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 O-O 8.
cxd5 exd5 9. Ne2 b6 10. O-O Nc6 11. Ng3 Re8 12. f3 h5 13. Ra2 g6 14. Re2 h4 15.
Nh1 h3 16. Qe1 hxg2 17. Kxg2 Kg7 18. h4 Rh8 19. e4 Be6 20. e5 Nh5 21. Bg5 Qd7
22. Nf2 cxd4 23. Bb5 a6 24. Bxc6 Qxc6 25. cxd4 Rac8 26. Qb4 Qc4 27. Qd2 Qc3 28.
Bf6+ Nxf6 29. exf6+ Kg8 30. Qf4 Qxa3 31. Ng4 Rh5 32. Re5 Bxg4 33. Qxg4 Rc2+ 34.
Kh3 Qd3 35. Rfe1 Rxe5 36. dxe5 Rc4 37. Qg2 Qf5+ 38. Kh2 Rxh4+ 39. Kg1 Rh5 40.
Kf2 Qf4 0-1

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.24"]
[Round "12"]
[White "Nievergelt, Erwin"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E38"]
[BlackElo "2370"]
[PlyCount "99"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Switzerland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "SUI"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Na6 6. g3 Nxc5 7. Bg2 O-O 8.
Bd2 d6 9. Nf3 Bd7 10. O-O Bc6 11. Rad1 Qe7 12. Ng5 Bxg2 13. Kxg2 h6 14. Nce4
Nfxe4 15. Nxe4 Bxd2 16. Rxd2 Nxe4 17. Qxe4 Rfd8 18. Rfd1 Rac8 19. b3 Qc7 20.
Kg1 Qb6 21. Qf4 Rc6 22. Rd3 a5 23. e4 f6 24. Qg4 Re8 25. Rf3 Qd8 26. Qg6 Rf8
27. e5 fxe5 28. Qxe6+ Kh7 29. Rf7 Rxf7 30. Qxf7 Qb6 31. h4 Qb4 32. h5 a4 33.
Qg6+ Kh8 34. Rd3 Qe1+ 35. Kg2 axb3 36. Rf3 Rc8 37. axb3 Qb4 38. g4 Qd2 39. Rf7
Rg8 40. Rxb7 Qf4 41. Rf7 Qd4 42. Rd7 Qb6 43. Qxd6 Qxb3 44. Qd5 Rf8 45. Rf7 Rxf7
46. Qxf7 Qd1 47. Qf8+ Kh7 48. Qf5+ Kg8 49. Qe4 Kf8 50. Qf3+ 1-0

[Event "Amsterdam ol (Men) fin-B"]
[Site "Amsterdam"]
[Date "1954.09.25"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Store, Thor"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "2370"]
[PlyCount "103"]
[EventDate "1954.09.12"]
[EventType "team-tourn"]
[EventRounds "13"]
[EventCountry "NED"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[WhiteTeam "Columbia"]
[BlackTeam "Norway"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "NOR"]

1. d4 d5 2. c4 c6 3. Nf3 e6 4. e3 f5 5. Be2 Nf6 6. O-O Be7 7. b3 O-O 8. Ne5
Nbd7 9. Nd3 Kh8 10. Ba3 Bxa3 11. Nxa3 Qe7 12. Nc2 e5 13. Nxe5 Nxe5 14. dxe5
Qxe5 15. Qd4 Qxd4 16. Nxd4 c5 17. Nb5 dxc4 18. bxc4 Ne4 19. Rfd1 a6 20. Nc7 Rb8
21. Rac1 b6 22. f3 Nf6 23. Rb1 Rb7 24. Nd5 Nxd5 25. Rxd5 Bd7 26. Rxc5 Rfb8 27.
Rd5 g6 28. Rd6 a5 29. Rbd1 Be8 30. h4 Bf7 31. Kf2 Rc7 32. Rd8+ Rxd8 33. Rxd8+
Kg7 34. Rd4 Kf8 35. g4 fxg4 36. Rxg4 Ke7 37. Rd4 Rc5 38. f4 Be6 39. Bd3 Bf7 40.
Kg3 Be6 41. e4 Kf7 42. e5 Ke7 43. h5 Kf7 44. Kh4 gxh5 45. Kxh5 Kg7 46. Kh4 Bg8
47. Rd7+ Kf8 48. Kg5 h6+ 49. Kxh6 Bxc4 50. Bxc4 Rxc4 51. Kg5 Ra4 52. Rb7 1-0

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "1"]
[White "Rossetto, Hector"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "D38"]
[PlyCount "87"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. cxd5 exd5 5. Nc3 Bb4 6. Qa4+ Nc6 7. Bg5 h6 8.
Bh4 g5 9. Bg3 Ne4 10. Rc1 O-O 11. e3 Bf5 12. Be2 a6 13. O-O Bxc3 14. bxc3 Nxg3
15. hxg3 b5 16. Qd1 Qd6 17. Bd3 Qg6 18. Bxf5 Qxf5 19. Ne1 Na5 20. Nd3 Nc4 21.
g4 Qg6 22. Nc5 c6 23. Re1 f5 24. Qc2 a5 25. gxf5 Qxf5 26. e4 dxe4 27. Rxe4 Rf6
28. Qe2 Raf8 29. f3 Nb6 30. Re5 Qg6 31. Re1 a4 32. Re7 Nd5 33. Nd7 Nxe7 34.
Nxf8 Rxf8 35. Qxe7 Rf7 36. Qe8+ Kg7 37. Re6 Qb1+ 38. Kh2 Qxa2 39. Qxc6 Qc2 40.
Qxb5 a3 41. Qe5+ Kh7 42. Re8 Rg7 43. Ra8 a2 44. Qe8 1-0

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "C77"]
[PlyCount "112"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. c3 b5 7. Bc2 O-O 8. O-O
d5 9. d4 Bg4 10. Nbd2 exd4 11. e5 Nd7 12. h3 dxc3 13. Qd3 g6 14. Qxc3 Nc5 15.
b4 d4 16. Qb2 Na4 17. Bxa4 Bxf3 18. Nxf3 bxa4 19. Bh6 Re8 20. b5 axb5 21. Qxb5
Nb4 22. a3 Nd5 23. Qc6 Nc3 24. Bd2 Qd5 25. Qxd5 Nxd5 26. Nxd4 Bf8 27. Nc6 Ra6
28. Rfc1 Rb6 29. Rc4 Re6 30. Nb4 Rxe5 31. Nxd5 Rxd5 32. Be3 Rb3 33. Rxa4 Rdd3
34. Rc4 Rxa3 35. Rxa3 Bxa3 36. Bf4 Bd6 37. Bxd6 cxd6 38. Kf1 Kg7 39. Ke2 Rd5
40. f4 Kf6 41. g4 h5 42. Rc8 Rc5 43. Rd8 Ke7 44. Rh8 Rc3 45. gxh5 Rxh3 46. h6
d5 47. Kf2 d4 48. Kg2 Rh5 49. Ra8 Rxh6 50. Ra4 d3 51. Re4+ Kf6 52. Rd4 Kf5 53.
Kg3 Rh1 54. Rxd3 Rg1+ 55. Kf2 Rg4 56. Rd5+ Kxf4 0-1

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "3"]
[White "Flores Alvarez, Rodrigo"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E66"]
[PlyCount "76"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 c5 5. O-O O-O 6. c4 Nc6 7. d5 Na5 8. Qd3
d6 9. Nfd2 a6 10. Nc3 Rb8 11. a4 e6 12. Rb1 Ng4 13. b3 e5 14. h3 Nh6 15. Ba3 b6
16. b4 Nb7 17. bxc5 bxc5 18. Rb3 f5 19. e4 fxe4 20. Ndxe4 Ra8 21. Rfb1 Ra7 22.
Rb6 Nf7 23. Bc1 Qe7 24. Be3 Bh6 25. Nxd6 Nbxd6 26. Bxc5 Bf5 27. Be4 Rc7 28. Ba3
Rfc8 29. c5 Rxc5 30. Bxc5 Rxc5 31. Bxf5 gxf5 32. Rc6 Qa7 33. Rbb6 Rxc6 34. Rxc6
a5 35. Nb5 Qb8 36. Qc2 Bf8 37. Qe2 Qd8 38. Nc7 Qb8 1/2-1/2

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "B93"]
[PlyCount "112"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Nbd7 8. Bd3
Be7 9. O-O O-O 10. a4 b6 11. Qe1 Bb7 12. Kh1 Qc7 13. fxe5 dxe5 14. Bg5 Nc5 15.
Nd2 Nxd3 16. cxd3 Ne8 17. Bxe7 Qxe7 18. Nc4 Rd8 19. Qe3 Qc5 20. Rf3 Nd6 21.
Nxb6 Qb4 22. Qf2 f5 23. Nbd5 Bxd5 24. Nxd5 Qb7 25. Rf1 Rfe8 26. Qh4 Rd7 27. Rh3
h6 28. Rg3 Kh7 29. Qh5 Rf8 30. Qg6+ Kh8 31. b4 Qc6 32. Ne3 Rf6 33. Qh5 f4 34.
Ng4 fxg3 35. Nxf6 Rf7 36. hxg3 Rxf6 37. Rxf6 Qc1+ 38. Kh2 gxf6 39. Qg6 Qg5 40.
Qxg5 hxg5 41. g4 Kg8 42. Kg3 Kf7 43. Kf3 Ke7 44. Ke3 Kd7 45. Kd2 Kc6 46. Kc3 a5
47. bxa5 Nf7 48. Kc4 Nh6 49. d4 Nf7 50. d5+ Kc7 51. d6+ Kc6 52. d7 Nd6+ 53. Kb4
Kxd7 54. Kc5 Nxe4+ 55. Kb6 Kc8 56. a6 Kb8 0-1

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "5"]
[White "Toran Albero, Roman"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A89"]
[PlyCount "67"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. c4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. Nc3 d6 7. d4 Nc6 8. Qc2
e5 9. dxe5 dxe5 10. Rd1 Qe7 11. Nd5 Nxd5 12. cxd5 Nb4 13. Qb3 Qd6 14. Nd2 b5
15. a3 Na6 16. Qxb5 Rb8 17. Qa5 e4 18. Nc4 Qc5 19. Qa4 Qb5 20. Qxb5 Rxb5 21.
Bg5 Rb3 22. f3 h6 23. Be3 Bd7 24. Bxa7 Bb5 25. Rac1 Ra8 26. Bd4 e3 27. f4 Bxd4
28. Rxd4 Rd8 29. Rd3 Nc5 30. Rdc3 Rxc3 31. Rxc3 Na4 32. Rc2 Bxc4 33. Rxc4 Nb6
34. Rxc7 1-0

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "E60"]
[PlyCount "146"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 Nf6 2. c4 g6 3. b3 Bg7 4. Bb2 O-O 5. g3 d6 6. d4 Bd7 7. Bg2 Qc8 8. O-O
Bh3 9. Nbd2 Bxg2 10. Kxg2 e5 11. dxe5 Nfd7 12. Qc2 dxe5 13. Rad1 Nc6 14. h4 Re8
15. h5 Nd4 16. Bxd4 exd4 17. hxg6 hxg6 18. c5 b6 19. c6 Nf8 20. Qc4 Qg4 21. Rh1
Bf6 22. e4 Rad8 23. Rde1 Qe6 24. e5 Qxc4 25. Nxc4 Be7 26. a4 d3 27. Rd1 Ne6 28.
Nb2 Nc5 29. b4 Na6 30. Nxd3 Bxb4 31. Nxb4 Nxb4 32. Rxd8 Rxd8 33. Rh4 a5 34. Rd4
Rc8 35. Rc4 Re8 36. Nd4 Rxe5 37. Nb5 Re7 38. Rc1 Kf8 39. Rd1 Ke8 40. Na7 Re6
41. Rc1 Kf8 42. Rc4 Kg7 43. f4 f5 44. Kf3 Kf6 45. Nb5 Na6 46. g4 Re7 47. gxf5
gxf5 48. Rc1 Rh7 49. Re1 Nc5 50. Re8 Ne6 51. Rc8 Rh3+ 52. Kf2 Rh2+ 53. Ke3 Ra2
54. Nxc7 Ra3+ 55. Kf2 Nxc7 56. Rxc7 Rxa4 57. Rb7 Rxf4+ 58. Ke3 Rc4 59. Rxb6 Kg5
60. Ra6 Kg4 61. Rxa5 f4+ 62. Kf2 Rc2+ 63. Kg1 Kg3 64. Rg5+ Kf3 65. Ra5 Rc1+ 66.
Kh2 Rxc6 67. Ra3+ Kg4 68. Kg2 Rc2+ 69. Kf1 Rb2 70. Rc3 Rh2 71. Kg1 Re2 72. Kf1
Rb2 73. Ra3 f3 1/2-1/2

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "7"]
[White "Pilnik, Herman"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C76"]
[PlyCount "130"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. O-O g6 7. d4 Bg7 8. dxe5
dxe5 9. Bg5 Nf6 10. Nbd2 Qe7 11. b4 O-O 12. Bb3 h6 13. Be3 Rfd8 14. Qc2 Be6 15.
Rfd1 Nh5 16. g3 Rd7 17. Kg2 Rad8 18. Nf1 Qf6 19. Ng1 Bxb3 20. Qxb3 Rxd1 21.
Rxd1 Rxd1 22. Qxd1 Qe6 23. Qd2 Nf6 24. f3 Kh7 25. Bf2 Qd7 26. Qc2 b5 27. a4 Nd8
28. axb5 axb5 29. Ne2 Ne6 30. h4 h5 31. Nc1 Bh6 32. Nd3 Qd6 33. c4 c6 34. c5
Qc7 35. Qa2 Nd7 36. Be1 Nd8 37. Bc3 f6 38. g4 hxg4 39. fxg4 Nf8 40. g5 Qd7 41.
Nf2 Bg7 42. gxf6 Bxf6 43. Nh2 Nf7 44. Nf3 Ne6 45. Bd2 Kg7 46. Be3 Nf4+ 47. Bxf4
exf4 48. Qe2 Ne5 49. Nxe5 Bxe5 50. Nd3 Qd4 51. Qf3 Qc3 52. Kh3 Qa1 53. Nxe5
Qxe5 54. Kg4 Qd4 55. Qxf4 Qg1+ 56. Qg3 Qd1+ 57. Qf3 Qg1+ 58. Kh3 Qe1 59. e5
Qxe5 60. Qxc6 Qc3+ 61. Kg2 Qd2+ 62. Kf3 Qc3+ 63. Kg2 Qd2+ 64. Kh3 Qc3+ 65. Kh2
Qe5+ 1/2-1/2

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "8"]
[White "Pachman, Ludek"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E14"]
[PlyCount "101"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 Be7 6. O-O O-O 7. b3 d5 8. Bb2
Nbd7 9. Nc3 Ne4 10. Rc1 a6 11. Qc2 f5 12. Ne2 Bd6 13. Ne5 Bxe5 14. dxe5 Ndc5
15. Bxe4 dxe4 16. Ba3 Rf7 17. Bxc5 bxc5 18. Rfd1 Qe8 19. Rd2 Bc6 20. Nf4 Rd7
21. Rxd7 Qxd7 22. Rd1 Qe8 23. h4 g6 24. Qd2 a5 25. Qe2 h5 26. Qb2 Kf7 27. g3
Qh8 28. Nh3 Qb8 29. Rd2 Qb4 30. Qc2 Ke7 31. Qd1 Qb8 32. Ng5 a4 33. Nh7 axb3 34.
axb3 Qh8 35. Nf6 Rd8 36. Rxd8 Qxd8 37. Qxd8+ Kxd8 38. Nh7 Be8 39. Ng5 Kd7 40.
Kf1 Ke7 41. Ke2 Bc6 42. Kd2 Bd7 43. f3 exf3 44. Nxf3 Kd8 45. Ne1 Ke7 46. Nd3
Kf7 47. Nxc5 Bc8 48. b4 g5 49. hxg5 Kg6 50. Ke2 Kxg5 51. Kf3 1-0

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Bauza, Lorenzo"]
[Result "0-1"]
[ECO "B53"]
[PlyCount "72"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. c4 Nf6 8.
Nc3 g6 9. O-O Bg7 10. Re1 O-O 11. Qd2 e6 12. Qe2 Qc7 13. Bd2 Rfe8 14. Rac1 Qb6
15. Be3 Qa5 16. Nd2 b6 17. Nb3 Qa6 18. f3 Rad8 19. Nd4 Ba8 20. Ndb5 Qb7 21.
Red1 Qb8 22. Bf4 Nh5 23. Bg5 Rd7 24. g4 Nf6 25. Bf4 Red8 26. Qd2 a6 27. Na3 g5
28. Bg3 Qb7 29. Qe1 d5 30. cxd5 exd5 31. e5 d4 32. Ne4 Nxe4 33. fxe4 b5 34. Nc2
d3 35. Nd4 Rxd4 36. e6 Rxe4 0-1

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "10"]
[White "Dodero, Emilio"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A46"]
[PlyCount "86"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. dxc5 Bxc5 5. e3 b6 6. Nc3 Bb7 7. Be2 Nc6 8. O-O
O-O 9. a3 Rc8 10. Qa4 Qc7 11. b4 Be7 12. Bb2 a5 13. Nb5 Qd8 14. bxa5 Nxa5 15.
Nd2 Rc5 16. Bd4 Rg5 17. f3 e5 18. Bc3 Bc5 19. Kf2 Nh5 20. g3 d6 21. Bb4 f5 22.
Bxc5 dxc5 23. Rad1 Qe7 24. Rg1 f4 25. e4 fxg3+ 26. hxg3 Nc6 27. Nf1 Nd4 28.
Nxd4 exd4 29. Bd3 Bxe4 30. Bxe4 Qxe4 31. Qb3 Qc6 32. Nh2 Qd6 33. f4 Rg6 34. Nf3
Nf6 35. Qd3 Ng4+ 36. Kg2 Rh6 37. Rh1 Ne3+ 38. Kf2 Nxd1+ 39. Qxd1 Rxh1 40. Qxh1
d3 41. Ng5 h6 42. Ne4 Qd4+ 43. Kf3 Re8 0-1

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Letelier Martner, Rene"]
[Result "1/2-1/2"]
[ECO "C15"]
[PlyCount "57"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Bxc3+ 6. Nxc3 Nc6 7. Bb5 Nge7
8. Bg5 f6 9. Be3 O-O 10. Qd2 f5 11. O-O-O a6 12. Bxc6 Nxc6 13. f3 e5 14. d5 Na5
15. fxe4 f4 16. Bc5 Nc4 17. Qe2 Nd6 18. h4 Bd7 19. Rdf1 Qf6 20. g3 f3 21. Qd3
Rf7 22. b3 Raf8 23. a4 Qg6 24. Bf2 Bg4 25. Re1 Rf6 26. Nb1 b5 27. c4 bxc4 28.
bxc4 Rb8 29. c5 1/2-1/2

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "12"]
[White "Wexler, Bernardo"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A07"]
[PlyCount "99"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 g6 4. O-O Bg7 5. d3 O-O 6. Nbd2 c6 7. e4 dxe4 8.
dxe4 Na6 9. Qe2 Qa5 10. e5 Ne8 11. Nc4 Qc7 12. Bf4 Be6 13. Rfe1 Qc8 14. Ng5
Nec7 15. Nxe6 Nxe6 16. Be3 Nac7 17. Rad1 Rd8 18. f4 Nd5 19. Bf2 Nf8 20. Rd2 b6
21. Red1 Ne6 22. Bxd5 Rxd5 23. Rxd5 cxd5 24. Rxd5 Qa6 25. a3 Rc8 26. b3 b5 27.
Ne3 Nc7 28. Rc5 e6 29. Qd3 Bf8 30. Rc3 Nd5 31. Nxd5 exd5 32. Rxc8 Qxc8 33. Qxd5
a6 34. c4 bxc4 35. Qxc4 Qxc4 36. bxc4 Bxa3 37. Kf1 Kf8 38. Ke2 Ke8 39. Kd3 Kd7
40. g4 Be7 41. f5 a5 42. c5 gxf5 43. gxf5 Kc6 44. Kc4 h5 45. f6 Bf8 46. Be3 a4
47. Kb4 Kd5 48. Kxa4 Kxe5 49. c6 Kd6 50. Bc5+ 1-0

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Gligoric, Svetozar"]
[Result "0-1"]
[ECO "B93"]
[PlyCount "70"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Nbd7 8. Bd3
Be7 9. O-O O-O 10. a4 b6 11. Qe1 Bb7 12. fxe5 dxe5 13. Kh1 Rc8 14. Bd2 Bb4 15.
Rd1 Nh5 16. Qe2 Bxc3 17. Bxc3 Nf4 18. Qe3 f6 19. Bb4 Rf7 20. g3 Nxd3 21. cxd3
a5 22. Ba3 Nc5 23. Bxc5 Rxc5 24. Rc1 Rd7 25. Ne1 Qe7 26. Rxc5 Qxc5 27. Qxc5
bxc5 28. Rf2 c4 29. dxc4 Bxe4+ 30. Kg1 Rd1 31. Re2 Bd3 32. Re3 Bxc4 33. b3 Bxb3
34. Rxb3 Rxe1+ 35. Kf2 Re4 0-1

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "14"]
[White "Idigoras Guisasola, Gregorio"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "E19"]
[PlyCount "90"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2
Nxc3 9. Qxc3 f5 10. d5 exd5 11. Ne1 d4 12. Qxd4 Bf6 13. Qd3 Bxg2 14. Nxg2 Kh8
15. Rd1 Na6 16. h4 Nc5 17. Qc2 Qe7 18. Rb1 Rae8 19. b4 Ne4 20. Bb2 f4 21. Nxf4
Bxb2 22. Rxb2 Rxf4 23. gxf4 Qxh4 24. e3 Nxf2 25. Qxf2 Qg4+ 26. Kh2 Qxd1 27. f5
Qh5+ 28. Kg2 Qg5+ 29. Kf1 Qxe3 30. f6 Qxf2+ 31. Rxf2 gxf6 32. Rxf6 Kg7 33. Rf4
Rf8 34. Rxf8 Kxf8 35. Kf2 Kf7 36. Kf3 Kf6 37. Kf4 h5 38. Kg3 h4+ 39. Kxh4 Ke5
40. Kg4 d6 41. b5 Kd4 42. Kf4 Kxc4 43. Ke4 Kxb5 44. Kd5 a5 45. Kd4 c6 0-1

[Event "Mar del Plata"]
[Site "Mar del Plata"]
[Date "1955.??.??"]
[Round "15"]
[White "De Greif, Boris"]
[Black "Szabo, Laszlo"]
[Result "0-1"]
[ECO "B68"]
[PlyCount "112"]
[EventDate "1955.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8.
O-O-O O-O 9. f4 a6 10. Be2 Bd7 11. Nb3 Qb8 12. Bf3 Rd8 13. g4 Qc7 14. Kb1 Rac8
15. h4 b5 16. h5 Ne8 17. Bxe7 Nxe7 18. g5 Bc6 19. Nd4 b4 20. Nce2 Ba8 21. Ng3
e5 22. Ndf5 Nxf5 23. Nxf5 exf4 24. Rh2 d5 25. exd5 Qe5 26. Qd3 Nd6 27. Nxd6
Rxd6 28. g6 fxg6 29. hxg6 h6 30. Re2 Qf6 31. Bg4 Rf8 32. Be6+ Kh8 33. b3 Bb7
34. Rf2 Bc8 35. Bxc8 Rxc8 36. Re1 Rf8 37. Qe4 Qxg6 38. Rxf4 Rfd8 39. Qxg6 Rxg6
40. Rd4 a5 41. Re2 Rgd6 42. Red2 g5 43. a3 Rb8 44. Rc4 Kg7 45. Rc5 h5 46. Rxa5
g4 47. axb4 g3 48. c4 h4 49. Kc2 h3 50. Ra7+ Kh6 51. Rd4 g2 52. Ra1 Kh5 53. Re1
Rg6 54. Rd3 Kh4 55. Rd4+ Rg4 56. Rxg4+ Kxg4 0-1

[Event "Moscow ol (Men) qual-D"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Troianescu, Octavio"]
[Result "1/2-1/2"]
[ECO "C02"]
[WhiteElo "2370"]
[PlyCount "48"]
[EventDate "1956.08.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Romania"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ROU"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 c4 7. g3 Bd7 8. Nbd2 Na5
9. Bg2 Ne7 10. O-O Nf5 11. Re1 Be7 12. Nf1 Nb3 13. Rb1 Nxc1 14. Qxc1 h6 15. Ne3
Nxe3 16. fxe3 Qc7 17. e4 dxe4 18. Nd2 Bg5 19. Bxe4 Bc6 20. Qd1 Bxd2 21. Qxd2
O-O 22. Qe2 Bxe4 23. Qxe4 b5 24. Rf1 Qe7 1/2-1/2

[Event "Moscow ol (Men) qual-D"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "3"]
[White "Szilagyi, Gyorgy"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A26"]
[BlackElo "2370"]
[PlyCount "64"]
[EventDate "1956.08.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Hungary"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "HUN"]
[BlackTeamCountry "COL"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nf3 d6 5. O-O O-O 6. Nc3 e5 7. d3 Nc6 8. Rb1
a5 9. a3 Nh5 10. b4 axb4 11. axb4 f5 12. b5 Ne7 13. Nd5 Nxd5 14. cxd5 f4 15.
Qb3 b6 16. Bd2 Bg4 17. Rfc1 Rf7 18. Rc2 Bf6 19. Ra2 Rxa2 20. Qxa2 Qd7 21. Qa8+
Rf8 22. Qb7 Bd8 23. Bc3 Bf6 24. Rc1 Bd8 25. Bb2 Qf5 26. Rc4 Bh3 27. Bxh3 Qxh3
28. Ra4 g5 29. Ra8 Ng7 30. Nxg5 Bxg5 31. Rxf8+ Kxf8 32. Qc8+ Qxc8 0-1

[Event "Moscow ol (Men) qual-D"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Limbos, Paul"]
[Result "1-0"]
[ECO "C79"]
[WhiteElo "2370"]
[PlyCount "97"]
[EventDate "1956.08.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Belgium"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "BEL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. c3 Bg4 7. d3 Nd7 8. Be3
Qf6 9. Nbd2 b5 10. Bb3 Na5 11. Bc2 c5 12. Qb1 Rc8 13. Rc1 Nc6 14. b4 Qd8 15. a4
Qb6 16. axb5 axb5 17. Bb3 Be7 18. Bd5 O-O 19. h3 Bxf3 20. Nxf3 Bf6 21. Ra3 Ne7
22. Qa2 Nxd5 23. Qxd5 Qc6 24. Qxc6 Rxc6 25. Ra7 Rd8 26. Rb7 Rb6 27. Rc7 h6 28.
Ra1 Kf8 29. Raa7 Ke8 30. bxc5 dxc5 31. Bxc5 Nxc5 32. Rxc5 Rxd3 33. Nxe5 Rd1+
34. Kh2 Re6 35. f4 g5 36. Rc8+ Rd8 37. Rxd8+ Bxd8 38. Nxf7 gxf4 39. Nxd8 Kxd8
40. Rb7 Rxe4 41. Rxb5 Re2 42. Rf5 Re4 43. Rh5 Ke7 44. Rxh6 Rc4 45. Kg1 Rxc3 46.
Kf2 Rb3 47. Rh4 f3 48. Re4+ Kd6 49. g4 1-0

[Event "Moscow ol (Men) qual-D"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "5"]
[White "Navabi, Abdolhossein"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A88"]
[BlackElo "2370"]
[PlyCount "82"]
[EventDate "1956.08.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Iran"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "IRI"]
[BlackTeamCountry "COL"]

1. Nf3 f5 2. c4 Nf6 3. Nc3 g6 4. b3 Bg7 5. Bb2 O-O 6. d4 d6 7. g3 c6 8. Bg2 Qa5
9. O-O e5 10. dxe5 dxe5 11. e3 e4 12. Nd4 Ng4 13. Nce2 Na6 14. Bc3 Qc7 15. Nf4
Qf7 16. h4 h6 17. Nh3 Rd8 18. Qe2 Nc5 19. f3 exf3 20. Bxf3 Qe8 21. Rae1 Nf6 22.
Nf2 Nfe4 23. Nxe4 fxe4 24. Bg4 Nd3 25. Rd1 c5 26. Nb5 Bxc3 27. Bxc8 Raxc8 28.
Nxc3 Qe5 29. Nd5 Qxg3+ 30. Qg2 Qxg2+ 31. Kxg2 Kg7 32. h5 Rd7 33. hxg6 Rc6 34.
Rf7+ Rxf7 35. gxf7 Rg6+ 36. Kh2 Kxf7 37. Nc3 Ne5 38. Nxe4 b6 39. Kh3 Ke7 40.
Ng3 Ng4 41. Re1 Nf2+ 1/2-1/2

[Event "Moscow ol (Men) qual-D"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Anastasopoulos, Anastasios"]
[Result "1-0"]
[ECO "E80"]
[WhiteElo "2370"]
[PlyCount "57"]
[EventDate "1956.08.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Greece"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "GRE"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 c6 6. Bg5 Qa5 7. Qd2 a6 8. Bd3
Nfd7 9. Nge2 b5 10. cxb5 axb5 11. Rc1 Bb7 12. a3 b4 13. axb4 Qxb4 14. Bxe7 Bxd4
15. Nxd4 Qxd4 16. Ne2 Qe5 17. Bh4 Nc5 18. Bc4 O-O 19. Bg3 Qg7 20. Qxd6 Nba6 21.
Be5 Rad8 22. Bxg7 Rxd6 23. Bxf8 Kxf8 24. Rd1 Rxd1+ 25. Kxd1 Na4 26. Kc2 N6c5
27. b4 Nb6 28. bxc5 Nxc4 29. Kc3 1-0

[Event "Moscow ol (Men) qual-D"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "7"]
[White "Herrmann, Ludwig"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E41"]
[BlackElo "2370"]
[PlyCount "68"]
[EventDate "1956.08.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "German Dem Rep"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "DDR"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 b6 7. O-O O-O 8. d5
Ne7 9. Ne4 Nxe4 10. Bxe4 f5 11. Bd3 b5 12. a3 bxc4 13. Bxc4 Ba5 14. e4 fxe4 15.
Ng5 Rf5 16. Nxe4 Nxd5 17. Nd6 Qf8 18. Nxf5 Qxf5 19. Bd3 Qf7 20. Be3 Bb6 21. Qc2
Qh5 22. Be4 Bb7 23. Bf3 Qe5 24. Rfe1 Rf8 25. Bxc5 Qc7 26. Rac1 Rc8 27. Qd2 Bxc5
28. b4 Bxf2+ 29. Kxf2 Qb6+ 30. Ke2 Qb5+ 31. Kd1 Qa4+ 32. Ke2 Qb5+ 33. Kf2 Qb6+
34. Ke2 Qb5+ 1/2-1/2

[Event "Moscow ol (Men) qual-D"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Sefc, Jan"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "2370"]
[PlyCount "40"]
[EventDate "1956.08.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Czechoslovakia"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "CSR"]

1. Nf3 d5 2. c4 e6 3. g3 dxc4 4. Qa4+ Bd7 5. Qxc4 Bc6 6. Bg2 Nf6 7. d3 Bd5 8.
Qc2 c5 9. Nc3 Bc6 10. O-O Nbd7 11. b3 Rc8 12. Bb2 Be7 13. Rac1 O-O 14. Rfd1 Qb6
15. Qd2 Rfd8 16. Qf4 a6 17. Nd2 Bxg2 18. Kxg2 Nd5 19. Qf3 Nxc3 20. Bxc3 Qc6
1/2-1/2

[Event "Moscow ol (Men) qual-D"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "9"]
[White "Benitez, Carlos"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B00"]
[BlackElo "2370"]
[PlyCount "99"]
[EventDate "1956.08.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Philippines"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "PHI"]
[BlackTeamCountry "COL"]

1. e4 Nc6 2. d4 d5 3. e5 Bf5 4. c3 e6 5. Be3 h5 6. Nd2 Nge7 7. Be2 h4 8. h3 f6
9. f4 Qd7 10. Ngf3 Bg6 11. O-O Nf5 12. Bf2 Nce7 13. Re1 O-O-O 14. b4 Be8 15.
Bd3 Ng6 16. Bxf5 exf5 17. Be3 Qa4 18. Nb3 b6 19. Bd2 Bb5 20. Qc2 Rh5 21. Be3
Be7 22. Rad1 Re8 23. Qb2 Nh8 24. Qf2 Nf7 25. Bc1 Qa6 26. Nh2 Bc4 27. Nf1 Rhh8
28. Ne3 Nh6 29. Nxc4 Qxc4 30. Bd2 Rhg8 31. Re2 Qb5 32. Rde1 Nf7 33. Qf3 Kd8 34.
c4 Qxc4 35. Rc1 Qb5 36. a4 Qxa4 37. Qxd5+ Nd6 38. exd6 Bxd6 39. Rxe8+ Rxe8 40.
Ra1 Qd7 41. Rxa7 Ke7 42. Nc5 Bxc5 43. Qxd7+ Kxd7 44. bxc5 bxc5 45. dxc5 Kc6 46.
Kf2 Re4 47. Kf3 Rc4 48. Be3 Rc3 49. Ra8 g5 50. Rg8 1-0

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Jauregui Andrade, Carlos"]
[Result "1/2-1/2"]
[ECO "C09"]
[WhiteElo "2370"]
[PlyCount "80"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Chile"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "CHI"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nc6 5. exd5 exd5 6. Bb5 Bd6 7. O-O Nge7 8.
dxc5 Bxc5 9. Nb3 Bb6 10. Be3 Bxe3 11. Bxc6+ bxc6 12. fxe3 Qb6 13. Qd2 O-O 14.
Qc3 Ba6 15. Rfe1 Rac8 16. Nc5 Rc7 17. b4 Bc4 18. Ne5 Rd8 19. Nxc4 dxc4 20. Qxc4
Nd5 21. a3 Re7 22. e4 Rde8 23. Qd4 Nf6 24. Rad1 Re5 25. h3 h6 26. Kh2 h5 27.
Rd3 Kh7 28. c3 R8e7 29. Rde3 Qb8 30. Kg1 Qa8 31. Kf2 g5 32. g3 Kg8 33. a4 a5
34. R1e2 h4 35. g4 Qb8 36. Rf3 Rxc5 37. bxc5 Nxe4+ 38. Rxe4 Qh2+ 39. Ke3 Qg1+
40. Kd3 Qb1+ 1/2-1/2

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "2"]
[White "Muhring, Willem Jan"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E01"]
[BlackElo "2370"]
[PlyCount "40"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Netherlands"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 e6 3. g3 c5 4. Nf3 cxd4 5. Nxd4 d5 6. Bg2 e5 7. Nc2 d4 8. O-O
Nc6 9. e4 Bc5 10. Ne1 a5 11. Nd3 Qd6 12. f4 O-O 13. f5 Nd7 14. Rf2 f6 15. Nd2
Nb4 16. Bf1 a4 17. g4 Nxd3 18. Bxd3 Bb4 19. Rg2 Bxd2 20. Bxd2 Nc5 1/2-1/2

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Joffe, Manne"]
[Result "0-1"]
[ECO "B63"]
[WhiteElo "2370"]
[PlyCount "112"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Sweden"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "SWE"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 h6 8.
Bxf6 gxf6 9. f4 a6 10. Be2 h5 11. O-O-O Bd7 12. Kb1 Qb6 13. Rhf1 O-O-O 14. Nb3
Be7 15. f5 Ne5 16. Qd4 Qxd4 17. Nxd4 Rdg8 18. g3 h4 19. gxh4 Rxh4 20. Rg1 Rgh8
21. a3 Rxh2 22. Bg4 Nxg4 23. Rxg4 Bf8 24. Rf1 Rh1 25. Rxh1 Rxh1+ 26. Ka2 Kd8
27. Kb3 Ke7 28. Kc4 Rh2 29. a4 Bh6 30. Rg8 Bf8 31. Rg4 Rh8 32. b4 Bh6 33. Rh4
Kf8 34. b5 axb5+ 35. Ncxb5 Ke7 36. Kd3 Bg7 37. Rxh8 Bxh8 38. c4 Bg7 39. Nc3 Bh6
40. Kc2 Be3 41. Ndb5 Bc5 42. fxe6 fxe6 43. Kd3 f5 44. exf5 exf5 45. Nd4 Kf6 46.
Nd5+ Kg5 47. a5 Kh4 48. Nb6 Bxb6 49. axb6 Kg3 50. Ne2+ Kf2 51. Nd4 Kg3 52. Ne2+
Kf3 53. Nd4+ Kf4 54. Nb3 Bc6 55. Na5 Bg2 56. Kd4 Kg3 0-1

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "4"]
[White "Barda, Yngvar"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "C72"]
[BlackElo "2370"]
[PlyCount "68"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Norway"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "NOR"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. O-O g6 7. Qe2 Bg7 8. Rd1
Nf6 9. d4 Qe7 10. dxe5 dxe5 11. Nbd2 O-O 12. Nf1 Nd4 13. Nxd4 Bxa4 14. Nc2 Rfd8
15. Bg5 h6 16. Bh4 Rxd1 17. Rxd1 Rd8 18. Nfe3 Rxd1+ 19. Qxd1 g5 20. Bg3 Nxe4
21. Qe2 Qe6 22. b3 Bd7 23. c4 c6 24. f3 Nxg3 25. hxg3 e4 26. g4 exf3 27. gxf3
Qd6 28. Nf1 c5 29. Kg2 f5 30. Nfe3 fxg4 31. fxg4 Qf4 32. Qd1 Bc6+ 33. Kh3 Be5
34. Nf1 Qf2 0-1

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Dworzynski, Roman"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "2370"]
[PlyCount "65"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Poland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "POL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Bc5 7. c3 d6 8. O-O
O-O 9. Rd1 Qe7 10. d4 exd4 11. cxd4 Bb6 12. Nc3 Bg4 13. Be3 Na5 14. Bg5 Nxb3
15. axb3 Rfe8 16. h3 Bh5 17. g4 Bg6 18. e5 Qe6 19. d5 Qe7 20. Be3 dxe5 21. Bxb6
cxb6 22. d6 Qe6 23. b4 h6 24. Qe3 Nd7 25. Nh4 Bh7 26. f3 Bc2 27. Rd2 Bb3 28.
Nf5 Bc4 29. Ne4 a5 30. bxa5 bxa5 31. Nc5 Nxc5 32. Qxc5 a4 33. d7 1-0

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "6"]
[White "Noradounguian, Georges"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C48"]
[BlackElo "2370"]
[PlyCount "35"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "France"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxd4 exd4 6. e5 dxc3 7. exf6 Qxf6
8. dxc3 Qe5+ 9. Be2 Bc5 10. O-O O-O 11. Bd3 d6 12. Qf3 c6 13. Bf4 Qf6 14. Qe4
Qh4 15. Bg3 Qxe4 16. Bxe4 d5 17. Bd3 Re8 18. Rfe1 1/2-1/2

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Kinzel, Anton"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "2370"]
[PlyCount "45"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Austria"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "AUT"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8.
Na3 b5 9. Nd5 Qa5+ 10. Bd2 Qd8 11. Bd3 Nxd5 12. exd5 Nb8 13. c4 bxc4 14. Nxc4
Nd7 15. Qa4 Rb8 16. Ba5 Qg5 17. O-O Be7 18. Nb6 Rxb6 19. Bxb6 f5 20. Rac1 Kf7
21. Be3 Qh4 22. Qxh4 Bxh4 23. Bxf5 1-0

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "8"]
[White "Rantanen, Matti"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E92"]
[BlackElo "2370"]
[PlyCount "135"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Finland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FIN"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 d6 3. Nf3 g6 4. Nc3 Bg7 5. e4 O-O 6. Be2 e5 7. dxe5 dxe5 8.
Qxd8 Rxd8 9. Bg5 Re8 10. h3 c6 11. O-O Nbd7 12. Rfe1 Nc5 13. Bf1 h6 14. Be3
Ncxe4 15. Nxe4 Nxe4 16. Bxh6 Bxh6 17. Rxe4 f6 18. Ree1 Rd8 19. Red1 Be6 20. Be2
c5 21. b3 e4 22. Ne1 f5 23. Rxd8+ Rxd8 24. Rd1 Bd2 25. Kf1 Kf7 26. Nc2 Ba5 27.
Rxd8 Bxd8 28. f3 Bh4 29. fxe4 fxe4 30. Ne3 Kf6 31. Bg4 Bf5 32. Nxf5 gxf5 33.
Bd1 Ke5 34. Bh5 Kd4 35. Ke2 a5 36. Be8 f4 37. Bd7 Bg3 38. Be8 Bh4 39. Bd7 Bg3
40. Be8 Ke5 41. Bd7 Kd4 42. Be6 b6 43. Bf7 Kc3 44. Bd5 e3 45. Kd1 a4 46. Bf3
axb3 47. axb3 Kxb3 48. Be2 Kc3 49. Bf1 Bh4 50. Be2 Bd8 51. Kc1 Kb4 52. Kc2 b5
53. cxb5 c4 54. h4 Kxb5 55. h5 Bg5 56. Kc3 Bf6+ 57. Kc2 Bg7 58. Bg4 Kc5 59. Bf3
Kd4 60. Be2 Kd5 61. Bf1 c3 62. h6 Be5 63. Bd3 Ke6 64. h7 Kf7 65. Kd1 Kg7 66.
Ke2 Kh6 67. Kf3 Kg5 68. Bc2 1/2-1/2

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Limbos, Paul"]
[Result "1/2-1/2"]
[ECO "E29"]
[WhiteElo "2370"]
[PlyCount "54"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Belgium"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "BEL"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. a3 Bxc3+ 7. bxc3 Nc6 8.
Ne2 b6 9. e4 Ne8 10. O-O Ba6 11. e5 f5 12. exf6 Nxf6 13. Bf4 d6 14. d5 Na5 15.
dxe6 Re8 16. Bxd6 Rxe6 17. Bg3 Nxc4 18. Nf4 Rd6 19. Qe2 Rxd3 20. Qxd3 Qxd3 21.
Nxd3 Nd5 22. Rfe1 Nxc3 23. Nf4 Na5 24. Re7 Nc6 25. Rc7 Rc8 26. Rxc8+ Bxc8 27.
Re1 Kf7 1/2-1/2

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Herrmann, Ludwig"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "2370"]
[PlyCount "83"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "German Dem Rep"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "DDR"]

1. e4 c5 2. Ne2 d6 3. g3 Nf6 4. Bg2 a6 5. c3 e5 6. a4 Nc6 7. O-O Be7 8. d3 Bg4
9. h3 Bd7 10. f4 Qc8 11. Kh2 O-O 12. Nd2 b5 13. axb5 axb5 14. Rxa8 Qxa8 15. Nf3
Rd8 16. Nh4 Be6 17. d4 cxd4 18. cxd4 d5 19. fxe5 Nxe4 20. Nf5 Bf8 21. Nc3 Qc8
22. g4 b4 23. Nxe4 dxe4 24. Bg5 Rd7 25. Qc2 Qa6 26. Qxe4 Bd5 27. Qe3 Bxg2 28.
Kxg2 Qc4 29. Rc1 Qe6 30. Qe4 Rd5 31. Bh4 g6 32. Ne3 Rxd4 33. Qxc6 Qxe5 34. Qf3
Rd2+ 35. Bf2 Bd6 36. Nf1 Rxb2 37. Rc8+ Kg7 38. Rc4 Bc5 39. Rxc5 Qxc5 40. Kg1
Qc1 41. Bd4+ Kh6 42. Be3+ 1-0

[Event "Moscow ol (Men) fin-B"]
[Site "Moscow"]
[Date "1956.??.??"]
[Round "11"]
[White "Moller, Baldur"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E99"]
[BlackElo "2370"]
[PlyCount "103"]
[EventDate "1956.09.02"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Island"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "ISL"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 e5 7. O-O Nc6 8. d5
Ne7 9. Ne1 Nd7 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. Nd3 Ng6 14. Rc1 Nf6 15. c5
Rf7 16. Nb5 g4 17. cxd6 cxd6 18. Rc2 g3 19. hxg3 fxg3 20. Bxg3 a6 21. Nc3 Nh5
22. Bh2 Bh6 23. g4 Be3+ 24. Kh1 Nhf4 25. Nxf4 Nxf4 26. Qe1 Bd4 27. Bxf4 Rxf4
28. Bd1 Bxc3 29. bxc3 Bd7 30. c4 Rc8 31. Qb4 Qc7 32. Rg1 a5 33. Qa3 Qc5 34.
Qxc5 Rxc5 35. Rb2 b5 36. cxb5 Bxb5 37. Kg2 Rf7 38. a4 Bd3 39. Rb8+ Rf8 40. Rb6
Rf6 41. Rc6 Rc4 42. Rxc4 Bxc4 43. Kf2 Rf7 44. Be2 Bxe2 45. Kxe2 Rb7 46. Rc1
Rb2+ 47. Ke3 Rb4 48. Rc6 Rxa4 49. Rxd6 Ra3+ 50. Kf2 Ra2+ 51. Kg3 a4 52. Re6 1-0

[Event "COL-ch"]
[Site "Monteria"]
[Date "1957.??.??"]
[Round "?"]
[White "Cuellar Gacharna, Miguel"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "D41"]
[PlyCount "47"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Nf3 cxd4 8.
cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 Nc6 12. O-O b6 13. Rac1 Na5 14. Bd3
Bb7 15. Qf4 Rc8 16. Rxc8 Qxc8 17. Rc1 Qb8 18. Rc7 Nc6 19. Ng5 Nxd4 20. Nxf7 Nf5
21. Ng5 Qd8 22. Bf1 Nd4 23. Qg3 Qb8 24. Qe5 1-0

[Event "COL-ch"]
[Site "Monteria"]
[Date "1957.??.??"]
[Round "?"]
[White "De Greif, Boris"]
[Black "Posada, Jorge M"]
[Result "1/2-1/2"]
[ECO "D93"]
[PlyCount "38"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 c6 6. Nf3 O-O 7. h3 Nbd7 8. cxd5
Nxd5 9. Nxd5 cxd5 10. Be2 Qa5+ 11. Qd2 Qxd2+ 12. Kxd2 f6 13. Bc7 Nb8 14. Bxb8
Rxb8 15. Rhc1 Rd8 16. Rc7 Bd7 17. b4 Bf8 18. a3 e6 19. Rc3 Rbc8 1/2-1/2

[Event "Caracas zt"]
[Site "Caracas"]
[Date "1957.??.??"]
[Round "?"]
[White "De Greif, Boris"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "C50"]
[PlyCount "134"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "VEN"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. d3 d6 6. Be3 O-O 7. Bg5 Ne7 8. Qd2
c6 9. O-O-O b5 10. Bb3 a5 11. a4 Bb4 12. Bxf6 gxf6 13. Qh6 Bxc3 14. bxc3 Ng6
15. Rhe1 bxa4 16. Bxa4 Bg4 17. Re3 Kh8 18. Bxc6 Rc8 19. Bd5 Rxc3 20. Nh4 Nxh4
21. Qxh4 f5 22. Qxd8 Rxd8 23. f3 f4 24. Ree1 Be6 25. Bc4 Ra3 26. Bxe6 fxe6 27.
Kd2 Rg8 28. Rg1 Ra2 29. Rb1 d5 30. exd5 exd5 31. Rb5 e4 32. dxe4 dxe4 33. fxe4
f3 34. g3 Rc8 35. Rc1 a4 36. Rf5 Ra3 37. c3 Rb3 38. Rxf3 a3 39. Rc2 Rd8+ 40.
Rd3 Rf8 41. Ke2 Ra8 42. Rd1 Kg7 43. Rf1 Rab8 44. Kd3 Rb2 45. Rxb2 Rxb2 46. Rf5
Rxh2 47. Ra5 Rg2 48. Rxa3 Rxg3+ 49. Kd4 h5 50. Ra7+ Kg6 51. Ra8 Kg7 52. Ra7+
Kg6 53. Ra8 Kg7 54. Ra2 h4 55. Rh2 h3 56. c4 Kf6 57. c5 Ra3 58. Rb2 Ra1 59. Rh2
Rd1+ 60. Kc3 Re1 61. Rxh3 Rxe4 62. c6 Ke7 63. Rh7+ Kd6 64. c7 Re8 65. Kd4 Rc8
66. Rg7 Rxc7 67. Rxc7 Kxc7 1/2-1/2

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Ramirez, Hernan"]
[Result "1/2-1/2"]
[ECO "D00"]
[PlyCount "73"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. h3 d5 5. Nc3 a6 6. e3 Nbd7 7. Be2 c5 8. dxc5
Nxc5 9. Be5 O-O 10. O-O e6 11. a4 Qe7 12. a5 Ne8 13. Bxg7 Nxg7 14. Qd4 Nf5 15.
Qb4 Nd7 16. Qxe7 Nxe7 17. e4 Nf6 18. exd5 Nexd5 19. Nxd5 exd5 20. Rfd1 Bf5 21.
Nd4 Bd7 22. Ra3 Rac8 23. Rb3 Rc7 24. Rb6 Kg7 25. Bf3 Re8 26. c4 Rxc4 27. Rxb7
Ra4 28. Nb3 Bc8 29. Rb8 Bd7 30. Rxe8 Bxe8 31. Bxd5 Rb4 32. Nc5 Rb5 33. b4 Rxb4
34. Nxa6 Rb5 35. Nc7 Rxa5 36. Nxe8+ Nxe8 37. Bc6 1/2-1/2

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "2"]
[White "Martin, Pedro1"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C64"]
[PlyCount "49"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. O-O Nd4 5. Nxd4 Bxd4 6. c3 Bb6 7. d4 c6 8.
Ba4 d6 9. dxe5 dxe5 10. Qxd8+ Bxd8 11. Be3 Nf6 12. Nd2 Ng4 13. Bc5 Be7 14. Bxe7
Kxe7 15. Bb3 Be6 16. Bxe6 Kxe6 17. Rad1 Rhd8 18. Nc4 Nf6 19. f3 Ne8 20. Kf2 Nd6
21. Nxd6 Rxd6 22. Rxd6+ Kxd6 23. Rd1+ Ke6 24. Ke3 g6 25. g3 1/2-1/2

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Estrada, Vicente"]
[Result "1/2-1/2"]
[ECO "D45"]
[PlyCount "40"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 d5 2. c4 c6 3. Nf3 e6 4. e3 Nf6 5. Nc3 Nbd7 6. Qc2 Be7 7. b3 a6 8. Bd3 b5
9. O-O O-O 10. Bb2 Re8 11. Ne5 Bb7 12. c5 Nf8 13. b4 N6d7 14. f4 f6 15. Nxd7
Qxd7 16. a4 Qc7 17. a5 f5 18. Ne2 Nd7 19. g4 g6 20. g5 Bf8 1/2-1/2

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "4"]
[White "Gutierrez Castillo, Jose Antonio"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "D03"]
[PlyCount "50"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Ne4 4. Bh4 Bg7 5. Nbd2 d5 6. e3 Nd6 7. Be2 O-O 8. c4
dxc4 9. Nxc4 Nf5 10. Bg3 Nd7 11. e4 Nxg3 12. hxg3 c5 13. dxc5 Nxc5 14. Qxd8
Rxd8 15. e5 h6 16. b4 Nd3+ 17. Bxd3 Rxd3 18. Rd1 Rxd1+ 19. Kxd1 Be6 20. Ne3
Bxa2 21. Ke2 a5 22. b5 a4 23. Rc1 a3 24. Rc7 Bb1 25. Nd2 a2 0-1

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Ramirez, Alfredo"]
[Result "1-0"]
[ECO "B31"]
[PlyCount "95"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. Re1 O-O 7. d4 d6 8. h3
cxd4 9. cxd4 Bd7 10. Nc3 a6 11. Bf1 e5 12. dxe5 dxe5 13. Be3 Re8 14. Bc4 Be6
15. Bxe6 Rxe6 16. Qb3 Nd4 17. Bxd4 exd4 18. Rad1 Qb6 19. Nxd4 Qxb3 20. Nxb3
Rae8 21. f3 Nh5 22. Nd5 Rc6 23. g4 Nf6 24. Nc3 h6 25. Rd3 Rec8 26. Red1 Ne8 27.
Nd5 Kf8 28. Nd4 Rc1 29. Nc3 Rxd1+ 30. Rxd1 Rc4 31. Nde2 Rb4 32. b3 Rb6 33. Nd5
Rc6 34. Rc1 Bd4+ 35. Kf1 Rxc1+ 36. Nxc1 Nf6 37. Nxf6 Bxf6 38. Ke2 Ke7 39. Kd3
Kd6 40. Ne2 Kc5 41. f4 a5 42. e5 Bd8 43. Nc3 b5 44. Ne4+ Kc6 45. Nd6 f6 46. Nf7
Bc7 47. exf6 Bxf4 48. Nh8 1-0

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "6"]
[White "Posada, Jorge M"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C04"]
[PlyCount "84"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nh6 5. Be2 Be7 6. O-O O-O 7. Re1 b6 8. c3
Bb7 9. Bd3 dxe4 10. Nxe4 Nf5 11. Qe2 h6 12. Bf4 Re8 13. Rad1 Bf8 14. g4 Nh4 15.
g5 Nf5 16. gxh6 gxh6 17. Bxc7 Qe7 18. Be5 Bg7 19. Bxg7 Kxg7 20. Ne5 Nxe5 21.
dxe5 Qh4 22. Qf3 Rg8 23. Bf1 Kh8+ 24. Bg2 Rxg2+ 25. Kxg2 Rg8+ 26. Kf1 Ba6+ 27.
Rd3 Qxh2 28. Ke2 Qxe5 29. Kd2 Bxd3 30. Qxd3 Qd5 31. Qxd5 exd5 32. Nf6 Rg2 33.
Re8+ Kg7 34. Rg8+ Kxf6 35. Rxg2 a5 36. Ke2 Ke5 37. Rh2 a4 38. Kf3 d4 39. cxd4+
Nxd4+ 40. Kg4 f5+ 41. Kh5 Nf3 42. Rh3 Ke4 1/2-1/2

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Sanchez, Luis Augusto"]
[Result "1/2-1/2"]
[ECO "E39"]
[PlyCount "38"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. a3 Bxc5 7. Nf3 b6 8. Bg5
Bb7 9. e3 Be7 10. Be2 h6 11. Bh4 d5 12. Bxf6 Bxf6 13. cxd5 Bxc3+ 14. Qxc3 Bxd5
15. O-O Nd7 16. Rac1 Rc8 17. Qd4 Qf6 18. Qxf6 Nxf6 19. Bd3 Bb7 1/2-1/2

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Munoz, Francisco"]
[Result "1/2-1/2"]
[ECO "C30"]
[PlyCount "123"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. f4 e5 2. e4 Nf6 3. fxe5 Nxe4 4. Nf3 d5 5. d3 Nc5 6. d4 Ne6 7. Be3 c5 8. c3
Nc6 9. Be2 Be7 10. O-O O-O 11. Na3 cxd4 12. cxd4 Qb6 13. Nc2 Bd7 14. Qd2 Rac8
15. Bf2 Rc7 16. Rab1 Rfc8 17. g3 Nf8 18. Ne3 Be6 19. Rfc1 Bb4 20. Qd1 Nxd4 21.
Nxd4 Rxc1 22. Rxc1 Rxc1 23. Qxc1 Qxd4 24. Nc2 Qxe5 25. Bf3 Qc7 26. Qd1 Bc5 27.
Nd4 Qe5 28. Kg2 b6 29. a3 Bxd4 30. Bxd4 Qc7 31. Bc3 Qc4 32. Qd2 h6 33. Qe3 Nd7
34. b4 Qa2+ 35. Bd2 Ne5 36. Be2 Nc4 37. Bxc4 Qxc4 38. Bc3 Qe4+ 39. Qxe4 dxe4
40. Kf2 f6 41. Ke3 Bd5 42. a4 Kf7 43. a5 bxa5 44. bxa5 a6 45. Bb4 g5 46. h4 f5
47. hxg5 hxg5 48. Bd2 Kg6 49. Bc3 Kh5 50. Be5 Bf7 51. Bc7 Kg4 52. Bd6 Bg6 53.
Bc7 Kh3 54. Kf2 f4 55. gxf4 g4 56. f5 Bxf5 57. Bb8 Kh4 58. Bc7 Kh5 59. Ke3 Kg5
60. Bd8+ Kh5 61. Kf4 Kg6 62. Bh4 1/2-1/2

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "9"]
[White "Mora, Nelson"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "D30"]
[PlyCount "39"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 e6 2. Nf3 Nf6 3. g3 c5 4. Bg2 d5 5. O-O Be7 6. cxd5 exd5 7. d4 O-O 8.
dxc5 Bxc5 9. e3 Nc6 10. Qc2 Qe7 11. a3 a5 12. Nc3 Rd8 13. Rb1 h6 14. Na4 Ba7
15. b4 axb4 16. axb4 Nxb4 17. Qb3 Nc6 18. Ba3 Qe8 19. Bc5 Bxc5 20. Nxc5 0-1

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Perez, Jaime"]
[Result "1/2-1/2"]
[ECO "E46"]
[PlyCount "79"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nge2 d5 6. a3 Be7 7. cxd5 exd5 8. g3
a5 9. Bg2 c6 10. O-O Ne8 11. Qc2 Nd6 12. f3 f5 13. Bd2 Nd7 14. Rae1 Nf6 15. Nf4
Bd7 16. Nd3 Nc4 17. Bc1 b5 18. b4 axb4 19. axb4 Bd6 20. e4 fxe4 21. fxe4 dxe4
22. Nxe4 Nxe4 23. Bxe4 Rxf1+ 24. Rxf1 Qe7 25. Nc5 h6 26. Qg2 Bxc5 27. dxc5 Rf8
28. Rxf8+ Kxf8 29. Qf3+ Kg8 30. Qf4 g5 31. Qf3 Qe5 32. Qd3 Be8 33. Be3 Qa1+ 34.
Kf2 Nxe3 35. Qxe3 Qb2+ 36. Kf1 Qxb4 37. h4 gxh4 38. Bd5+ cxd5 39. Qxe8+ Kg7 40.
Qe5+ 1/2-1/2

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "11"]
[White "Fernandez, Bernardo"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "0"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

0-1

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Rodriguez, Jose ES"]
[Result "1/2-1/2"]
[ECO "B67"]
[PlyCount "81"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8.
O-O-O Bd7 9. f4 h6 10. Bh4 Nxe4 11. Qe1 Nf6 12. Nf5 Qa5 13. Nxd6+ Bxd6 14. Rxd6
O-O-O 15. Rd1 Kb8 16. Be2 Bc8 17. Qg3 Qf5 18. Bd3 Qh5 19. Qxg7 Qxh4 20. g3 Nh5
21. Qxh8 Rxh8 22. gxh4 Nxf4 23. Ne4 f5 24. Nd6 Rf8 25. Rdf1 e5 26. Nxc8 Kxc8
27. Rhg1 Rf7 28. Bc4 Re7 29. a4 Nd4 30. Rg8+ Kc7 31. c3 Nde6 32. Bxe6 Rxe6 33.
Rf8 Rg6 34. Rxf5 Rg2 35. R1xf4 exf4 36. Rxf4 Rxh2 37. a5 h5 38. b4 b5 39. c4
bxc4 40. Rxc4+ Kb7 41. Kd1 1/2-1/2

[Event "COL-ch"]
[Site "Pereira"]
[Date "1958.??.??"]
[Round "13"]
[White "Cuellar Gacharna, Miguel"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "D25"]
[PlyCount "69"]
[EventDate "1958.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Be6 5. Na3 c5 6. Bd2 cxd4 7. Nxd4 Bd5 8.
Nxc4 Nfd7 9. Rc1 e6 10. Nb5 Nc5 11. b4 Ne4 12. Nb6 axb6 13. Nc7+ Kd7 14. Nxa8
Nc6 15. b5 Qxa8 16. bxc6+ bxc6 17. Bc4 Ba3 18. Bxd5 cxd5 19. Rb1 Qa6 20. Qe2
Ra8 21. Qxa6 Rxa6 22. f3 Nd6 23. Ke2 Nc4 24. Rb3 Bb2 25. a3 Rxa3 26. Rxa3 Bxa3
27. Bc3 e5 28. Rb1 Bc5 29. e4 d4 30. Bb4 Nd6 31. Kd3 h5 32. Be1 f5 33. Ra1
fxe4+ 34. fxe4 Ne8 35. Ra8 {remainder unavailable; 1-0 in 51 moves} 1-0

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.01.20"]
[Round "1"]
[White "Gutierrez, Joaquin"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C64"]
[PlyCount "122"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Nxe4 8.
Bxb4 Nxb4 9. Qe2 O-O 10. Qxe4 Re8 11. Ne5 c6 12. a3 d6 13. O-O dxe5 14. dxe5
Qd5 15. Qxb4 Qxb5 16. Qxb5 cxb5 17. f4 Bd7 18. Nc3 Bc6 19. Rad1 Rad8 20. Rxd8
Rxd8 21. Rd1 Re8 22. Kf2 f6 23. exf6 gxf6 24. g3 Kf7 25. Rd4 a5 26. Nd1 h5 27.
Ne3 Kg6 28. h3 Re7 29. Rd6 Rc7 30. f5+ Kf7 31. Rd4 Be8 32. Rd2 Rc5 33. Rc2 b6
34. b4 axb4 35. axb4 Re5 36. Rc7+ Kf8 37. Kf3 Bf7 38. Kf4 Re8 39. Rc6 Rd8 40.
Rxf6 Rd4+ 41. Ke5 Rxb4 42. g4 Rb3 43. Kf4 Rb4+ 44. Kf3 hxg4+ 45. hxg4 Rd4 46.
g5 Kg7 47. Rxb6 Bh5+ 48. Kg3 Re4 49. Kf2 Rf4+ 50. Kg3 Re4 51. Kf2 Rf4+ 52. Ke1
b4 53. Rb7+ Kf8 54. Rb8+ Kg7 55. Rb7+ Kf8 56. Kd2 Rd4+ 57. Kc2 Bf3 58. Rb8+ Kg7
59. Rc8 Be4+ 60. Kb2 Rd2+ 61. Kc1 Re2 1/2-1/2

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.01.21"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Cuellar, Alfredo"]
[Result "1-0"]
[ECO "C32"]
[PlyCount "86"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Nd2 Qxd5 6. dxe4 Nxe4 7. Bc4 Qd4 8.
Qe2 f5 9. Ngf3 Qb6 10. Nxe4 fxe4 11. Qxe4+ Be7 12. Be3 Qa5+ 13. Bd2 Qf5 14.
Qxf5 Bxf5 15. O-O-O Nc6 16. Bc3 Kf8 17. Ne5 h5 18. Rhe1 Rh6 19. Nxc6 Rxc6 20.
Bd5 Rg6 21. Bxb7 Rb8 22. Bf3 Bd6 23. Be5 h4 24. Rd5 Bg4 25. Be4 Rh6 26. h3 Bc8
27. c3 Rb6 28. Red1 Kf7 29. Ra5 a6 30. Bd5+ Be6 31. Bxd6 cxd6 32. f5 Bxd5 33.
Raxd5 Rf6 34. R1d4 g6 35. Rf4 Ke7 36. Re4+ Kd7 37. fxg6 Rxg6 38. Rd2 Rh6 39.
Rdd4 Rf6 40. Rf4 Re6 41. Rd2 Rh6 42. c4 Kc6 43. b3 Rb8 1-0

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.01.23"]
[Round "3"]
[White "Ader Hausman, Walter"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E14"]
[PlyCount "44"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 Be7 6. Nc3 d5 7. b3 Nbd7 8. Bb2
O-O 9. O-O a6 10. Qe2 Ne4 11. Rad1 Bd6 12. Ne5 f5 13. cxd5 exd5 14. Bxe4 fxe4
15. Qg4 Nf6 16. Qe6+ Kh8 17. Nf7+ Rxf7 18. Qxf7 Bc6 19. f3 Be8 20. Qe6 Bd7 21.
Qf7 Be8 22. Qe6 Bd7 1/2-1/2

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.01.24"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Lombardy, William James"]
[Result "1/2-1/2"]
[ECO "E95"]
[PlyCount "53"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1
exd4 9. Nxd4 Nc5 10. f3 c6 11. Be3 a5 12. Qd2 a4 13. Rab1 Re8 14. b4 axb3 15.
axb3 Ne6 16. Nc2 Nd7 17. Bf1 Be5 18. Ne2 Ng7 19. Red1 f5 20. exf5 Nxf5 21. Bf2
Bg7 22. Ng3 Nf6 23. Nxf5 Bxf5 24. Ra1 Rxa1 25. Nxa1 d5 26. Nc2 Be6 27. Nd4
1/2-1/2

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.01.25"]
[Round "5"]
[White "Sanchez, Frank Clemente"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "E39"]
[PlyCount "96"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. Nf3 Na6 7. e3 Nxc5 8.
Bd2 b6 9. Nb5 Bxd2+ 10. Nxd2 Bb7 11. Nd6 Ba6 12. b4 Nb7 13. Nxb7 Bxb7 14. Bd3
Qe7 15. Qb2 Qd6 16. Ke2 Rfc8 17. f3 Rab8 18. Rad1 Qc7 19. Rc1 e5 20. e4 Nh5 21.
g3 Qd6 22. Nf1 f5 23. Ne3 fxe4 24. fxe4 Qg6 25. Qb1 Nf6 26. Nd5 Bxd5 27. cxd5
Qh5+ 28. Kf2 Rxc1 29. Qxc1 Rf8 30. Ke3 Ng4+ 31. Kd2 Qh6+ 32. Ke2 Rf2+ 33. Kd1
Qxc1+ 34. Kxc1 Rxa2 35. Kb1 Rd2 36. Bb5 Nf6 37. Rc1 Rd4 38. Rc8+ Kf7 39. Bc4 b5
40. Bb3 Rxb4 41. Kc2 Ke7 42. Ra8 Nxe4 43. Rxa7 Nc5 44. Ba2 Ra4 45. Rxa4 bxa4
46. Kc3 Kd6 47. Kc4 Ne4 48. Kb4 g5 0-1

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.01.27"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Medina Garcia, Antonio Angel"]
[Result "0-1"]
[ECO "D35"]
[PlyCount "112"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Re8 8.
Nf3 Nbd7 9. O-O Nf8 10. Bxf6 Bxf6 11. b4 c6 12. Qb3 Be6 13. Na4 Nd7 14. Rfc1
Rc8 15. Rab1 Qe7 16. Nc5 Nxc5 17. bxc5 Rc7 18. Qa4 a6 19. Rb6 Bc8 20. Rcb1 Qe6
21. Qc2 g6 22. R1b2 Bg7 23. Bf1 f5 24. R6b3 Rce7 25. Qd2 Bf6 26. g3 Kh8 27. Rb1
g5 28. Rd1 Qf7 29. Bg2 Qh5 30. Ne5 Bxe5 31. dxe5 Rxe5 32. f4 R5e7 33. Rf1 g4
34. Qd4+ Kg8 35. Rf2 Re6 36. Rd2 Rh6 37. Bh1 Qf7 38. a4 a5 39. Rb6 Rhe6 40. Rd3
Qe7 41. Rbb3 h5 42. Qc3 h4 43. Kf2 Kf7 44. Bg2 Kg6 45. Rb6 h3 46. Bh1 Re4 47.
Bxe4 Qxe4 48. Qd4 Qg2+ 49. Ke1 Qg1+ 50. Kd2 Qxh2+ 51. Kc1 Qxg3 52. Qxd5 Be6 53.
Qe5 h2 54. Rxb7 h1=Q+ 55. Rd1 Qxd1+ 56. Kxd1 Bb3+ 0-1

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.01.29"]
[Round "7"]
[White "Cuellar Gacharna, Miguel"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E40"]
[PlyCount "95"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 Nf6 2. d4 e6 3. Nc3 Bb4 4. e3 Nc6 5. Nge2 d5 6. a3 Be7 7. cxd5 exd5 8.
Nf4 O-O 9. Bd3 Be6 10. O-O Qd7 11. Qc2 Bd6 12. Nxe6 Qxe6 13. Bf5 Qe8 14. Nb5
Qd8 15. Nxd6 Qxd6 16. f3 g6 17. Bd3 Nd7 18. Bd2 Rae8 19. Rac1 f5 20. g3 Rf7 21.
Bb5 Ndb8 22. Qb3 a6 23. Bxc6 bxc6 24. Qd3 h5 25. Rf2 Qe6 26. Rc3 g5 27. Rc1
Ref8 28. Re1 Re8 29. Rfe2 g4 30. Rf2 Nd7 31. fxg4 hxg4 32. Ref1 Ref8 33. Qxa6
Nf6 34. Rxf5 Ne4 35. Rxf7 Rxf7 36. Qe2 Rxf1+ 37. Kxf1 Qf5+ 38. Ke1 Ng5 39. Kd1
Qb1+ 40. Bc1 Qe4 41. a4 c5 42. a5 cxd4 43. exd4 Qxd4+ 44. Kc2 Nf7 45. Bd2 Qa4+
46. Kb1 Qd7 47. Bb4 Nd6 48. Bxd6 1-0

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.02.01"]
[Round "9"]
[White "Perez, Jaime"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B90"]
[PlyCount "93"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O
O-O 9. a4 b6 10. Be3 Be6 11. Nd2 Qc7 12. Re1 Nbd7 13. Nf1 Rfc8 14. f3 Qb7 15.
Bf2 d5 16. exd5 Nxd5 17. Nxd5 Bxd5 18. Ne3 Be6 19. Qd2 Bc5 20. Bd3 Nf6 21. Nf5
Bxf5 22. Bxf5 Rd8 23. Qe2 Qc7 24. Bd3 a5 25. Qxe5 Bd6 26. Qb5 Bxh2+ 27. Kf1
Rab8 28. Rad1 Bd6 29. Qc4 Bc5 30. Qh4 Bxf2 31. Kxf2 Qc5+ 32. Kf1 Rd5 33. g4 Rd4
34. Qg3 Rbd8 35. Re5 Qd6 36. Rde1 g6 37. g5 Nh5 38. Re8+ Rxe8 39. Rxe8+ Kg7 40.
Qxd6 Rxd6 41. Bc4 Ng3+ 42. Ke1 Nf5 43. c3 h6 44. gxh6+ Nxh6 45. b4 Rf6 46. bxa5
bxa5 47. Be2 1/2-1/2

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.02.02"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Davila, Edmundo"]
[Result "1-0"]
[ECO "E45"]
[PlyCount "59"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6 6. a3 Be7 7. Nf4 O-O 8. e4
d6 9. Bd3 c5 10. d5 e5 11. Nfe2 Bc8 12. O-O Nh5 13. f4 Nxf4 14. Nxf4 exf4 15.
e5 Nd7 16. exd6 Bxd6 17. Bxf4 Bxf4 18. Rxf4 Nf6 19. Qf3 a6 20. Rf1 Qd6 21. Qe2
Nd7 22. Rh4 Nf6 23. Rhf4 Nd7 24. Rf5 f6 25. Qe6+ Qxe6 26. dxe6 Ne5 27. Rxe5
fxe5 28. Bxh7+ Kxh7 29. Rxf8 Bb7 30. e7 1-0

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.02.04"]
[Round "11"]
[White "Humerez Estrada, Cidar"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B28"]
[PlyCount "99"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3 Bb4 7. Bg5 h6 8.
Bxf6 Bxc3+ 9. bxc3 Qxf6 10. c4 d6 11. Bd3 O-O 12. O-O a5 13. Qd2 a4 14. Nc1 Na6
15. Ne2 Bd7 16. Nc3 Bc6 17. Rad1 Nc5 18. Qe3 Qg5 19. Qxg5 hxg5 20. f3 a3 21.
Be2 Rfd8 22. Rd2 Kf8 23. Rb1 Ke7 24. Kf2 Rh8 25. Kg1 g6 26. Nd5+ Bxd5 27. Rxd5
Ra6 28. Bd3 Rc8 29. c3 Rcc6 30. Bc2 Rab6 31. Rdd1 Rxb1 32. Rxb1 Kd7 33. Kf2 Kc7
34. Ke3 Rb6 35. Rxb6 Kxb6 36. g3 Kc7 37. Ke2 Kd7 38. Ke3 Ke6 39. Ke2 Kf6 40.
Ke3 Ke6 41. Ke2 f5 42. Ke3 Kf6 43. g4 fxg4 44. fxg4 Ke7 45. Kd2 Kd7 46. Ke3 Kc6
47. Kd2 Nd7 48. Ke2 Nc5 49. Kd2 Kb6 50. Ke3 1/2-1/2

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.02.06"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "B99"]
[PlyCount "82"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Nbd7 8. Qf3
Qc7 9. O-O-O Be7 10. g4 b5 11. Bg2 Bb7 12. Rhe1 b4 13. Nd5 Nxd5 14. exd5 Bxg5
15. fxg5 Nc5 16. Qh3 e5 17. Nf5 g6 18. Ng3 Rc8 19. Ne4 Nxe4 20. Bxe4 O-O 21.
Kb1 a5 22. Rf1 Ba6 23. Rf6 Rfd8 24. Qe3 Qc5 25. Qxc5 Rxc5 26. Rd2 Kg7 27. Rdf2
Rd7 28. R6f3 Rc4 29. Re3 Bb7 30. Rd2 Rdc7 31. a3 bxa3 32. bxa3 Bc8 33. h3 h6
34. gxh6+ Kxh6 35. Kb2 f5 36. gxf5 gxf5 37. Bd3 Rh4 38. Rg2 Rg7 39. Rxg7 Kxg7
40. Rg3+ Kf6 41. Rg8 Bb7 0-1

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.02.07"]
[Round "13"]
[White "Najdorf, Miguel"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B64"]
[PlyCount "101"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8.
O-O-O O-O 9. f4 h6 10. Bxf6 Bxf6 11. Nxc6 bxc6 12. Qxd6 Qb6 13. e5 Rd8 14. Qa3
Qe3+ 15. Kb1 Rxd1+ 16. Nxd1 Qxa3 17. bxa3 Be7 18. c3 Bxa3 19. Kc2 Rb8 20. Bc4
a5 21. Re1 Bd7 22. Bb3 Be7 23. Nb2 c5 24. a4 Bc6 25. g3 Bd8 26. Bc4 Kf8 27. Bd3
Ke7 28. Be4 Bd5 29. Bxd5 exd5 30. f5 Bc7 31. Nd3 c4 32. Nf4 Rd8 33. Re2 Ke8 34.
Rd2 Bxe5 35. Nxd5 g6 36. fxg6 fxg6 37. Nb6 Rxd2+ 38. Kxd2 h5 39. Nxc4 Bc7 40.
Ke3 Kd7 41. Ke4 Kc6 42. Ne5+ Kc5 43. Nxg6 Kc4 44. Nf4 Bd8 45. Nxh5 Kxc3 46. Nf4
Kb3 47. Ne6 Be7 48. g4 Kxa4 49. g5 Kb3 50. g6 Bf6 51. Kd3 1-0

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.02.09"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Munoz, Francisco"]
[Result "0-1"]
[ECO "B88"]
[PlyCount "138"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 Qc7 7. Bb3 e6 8. O-O
Be7 9. f4 Nc6 10. Be3 Bd7 11. f5 Nxd4 12. Bxd4 h5 13. h3 e5 14. Be3 Bc6 15. Qd3
b5 16. Nd5 Nxd5 17. exd5 Bd7 18. c4 Qb7 19. Rac1 Rc8 20. Qe4 bxc4 21. Rxc4 Rxc4
22. Bxc4 Bd8 23. Kh2 Bb6 24. Bd2 Bd4 25. b4 Bb5 26. Rc1 O-O 27. f6 Bxc4 28.
Rxc4 Qb5 29. Rc1 g6 30. g4 h4 31. Kg2 Qa4 32. Qc2 Qa3 33. Qb3 Qxb3 34. axb3 e4
35. Rc4 Bxf6 36. Rxe4 Rb8 37. Kf3 Rb5 38. Re8+ Kg7 39. Ke4 a5 40. bxa5 Rxb3 41.
a6 Ra3 42. Ra8 Ra4+ 43. Kd3 Ra3+ 44. Kc4 Rxh3 45. Bb4 Rh2 46. a7 Ra2 47. Bxd6
h3 48. Bg3 Bh4 49. Kb3 Ra6 50. Bh2 Bf2 51. g5 Bd4 52. Kc4 Rxa7 53. Re8 Ra4+ 54.
Kb3 Ra5 55. d6 Rxg5 56. Kc4 Bf6 57. d7 Rg4+ 58. Kc5 Rd4 59. Kc6 g5 60. Re2 Kg6
61. Rf2 Bd8 62. Bd6 Rd1 63. Ra2 Kf5 64. Bh2 Rh1 65. Bb8 Rc1+ 66. Kd5 Rd1+ 67.
Kc6 g4 68. Ra8 Ke6 69. Bf4 Rxd7 0-1

[Event "Torneo de las Americas 1st"]
[Site "Bogota"]
[Date "1958.02.12"]
[Round "17"]
[White "Bisguier, Arthur Bernard"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E31"]
[PlyCount "72"]
[EventDate "1958.01.20"]
[EventType "tourn"]
[EventRounds "19"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 d6 7. dxe6 Bxe6 8. e3
O-O 9. Nf3 Nc6 10. Qc2 Bxc3+ 11. bxc3 Qe7 12. Be2 d5 13. cxd5 Bxd5 14. O-O Rad8
15. c4 Be4 16. Qc3 g5 17. Bg3 Nh5 18. Rad1 Nxg3 19. hxg3 Rxd1 20. Rxd1 Rd8 21.
Rxd8+ Qxd8 22. Nd2 Bg6 23. Nb3 b6 24. Bf3 Qd6 25. Bd5 Qe5 26. Qd2 Qf6 27. f4 a5
28. e4 a4 29. e5 Qf5 30. Bxc6 axb3 31. axb3 Qb1+ 32. Kh2 Qxb3 33. Qd8+ Kh7 34.
Qf6 gxf4 35. Qxf4 Qd3 36. Bd5 Qf5 1/2-1/2

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "1"]
[White "Tal, Mihail"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E14"]
[PlyCount "57"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. e3 Be7 5. b3 O-O 6. Bb2 b6 7. d4 Bb7 8. Bd3
Nbd7 9. O-O Ne4 10. cxd5 exd5 11. Qe2 a6 12. Qc2 f5 13. Ne2 Bd6 14. Ne5 Qe7 15.
Rac1 Rac8 16. Nc6 Qh4 17. Nf4 Ndf6 18. g3 Qh6 19. f3 g5 20. Nxd5 Nxd5 21. fxe4
fxe4 22. Bxe4 Nxe3 23. Rxf8+ Rxf8 24. Qe2 Bxc6 25. Bxc6 g4 26. a3 Qg5 27. Re1
Nf5 28. Qe6+ Rf7 29. Bd5 1-0

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]
[ECO "E93"]
[PlyCount "59"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. Be2 e5 7. d5 Nbd7 8. Bg5
h6 9. Bh4 a6 10. O-O Qe8 11. Ne1 Nxe4 12. Nxe4 f5 13. Nc3 g5 14. Bg3 f4 15. Bh5
Qe7 16. Ne4 Nc5 17. Bg6 Nxe4 18. Bxe4 g4 19. Nc2 h5 20. h4 Bd7 21. Qd3 fxg3 22.
fxg3 Bh6 23. Ne3 Kg7 24. Nf5+ Bxf5 25. Rxf5 Rxf5 26. Bxf5 Qf6 27. Be4 Rf8 28.
Qe2 Rf7 29. Rd1 a5 30. b3 1/2-1/2

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "3"]
[White "Sherwin, James T"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A53"]
[PlyCount "97"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. d5 Be7 5. e4 O-O 6. Bd3 Nbd7 7. Bc2 c6 8. Nge2
cxd5 9. cxd5 a6 10. Ng3 b5 11. O-O Nb6 12. h3 g6 13. Bh6 Re8 14. Bd3 b4 15. Na4
Bd7 16. Nxb6 Qxb6 17. Be3 Qb7 18. Qe2 Rec8 19. Rfc1 Ne8 20. Nf1 Rxc1 21. Rxc1
Bd8 22. Nd2 a5 23. Nc4 Rc8 24. Kh2 Qb8 25. g4 f6 26. f3 Ng7 27. f4 Bc7 28. Rf1
Rf8 29. f5 g5 30. h4 h6 31. Kg3 Kf7 32. Rh1 Rg8 33. hxg5 hxg5 34. Qh2 Ke7 35.
Qh7 Qf8 36. Rh6 Be8 37. Nd2 Kd8 38. Ba6 Ke7 39. Nf3 Kd8 40. Nxg5 fxg5 41. Bxg5+
Kd7 42. Re6 Bf7 43. Re7+ Qxe7 44. Bb5+ Kd8 45. Bxe7+ Kxe7 46. Qh4+ Kf8 47. Kf3
Ne8 48. g5 Rg7 49. g6 1-0

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Szabo, Laszlo"]
[Result "0-1"]
[ECO "E38"]
[PlyCount "78"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Bxc3+ 6. Qxc3 Ne4 7. Qc2 Qa5+
8. Bd2 Nxd2 9. Qxd2 Qxd2+ 10. Kxd2 Na6 11. g3 Nxc5 12. Bg2 a5 13. Nf3 Ra6 14.
Nd4 Rb6 15. b3 d6 16. Kc3 Bd7 17. Rhd1 Ke7 18. Rab1 Rc8 19. e4 g6 20. Re1 Bc6
21. Nxc6+ bxc6 22. e5 d5 23. f4 h6 24. Kd4 Na6 25. cxd5 cxd5 26. Rbc1 Rbc6 27.
Rxc6 Rxc6 28. Re2 Rc1 29. Rd2 Nb4 30. Bf3 g5 31. Bd1 gxf4 32. gxf4 Ra1 33. a4
Rc1 34. h4 f6 35. exf6+ Kxf6 36. Bh5 Rh1 37. Rg2 Rxh4 38. Rg6+ Kf5 39. Rxh6
Kxf4 0-1

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "6"]
[White "Pachman, Ludek"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E61"]
[PlyCount "83"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. c4 Nf6 2. Nc3 d6 3. g3 g6 4. Bg2 Bg7 5. d4 O-O 6. e3 c6 7. Nge2 a5 8. O-O e5
9. b3 exd4 10. Nxd4 Na6 11. Ba3 Re8 12. Re1 Nb4 13. Bb2 Bg4 14. Qd2 d5 15. h3
Bd7 16. cxd5 Nbxd5 17. Nxd5 Nxd5 18. Rad1 Qb6 19. Ne2 Bxb2 20. Qxb2 Be6 21. Nd4
Nb4 22. Nxe6 Rxe6 23. Rd7 Na6 24. Bf1 Nc5 25. Rd4 Rd8 26. Red1 Ree8 27. Bc4 Qc7
28. Qc3 Ne6 29. Bxe6 fxe6 30. h4 Rxd4 31. Qxd4 Qf7 32. Qb6 a4 33. bxa4 e5 34.
Rd2 Re7 35. Qc5 e4 36. Qd4 h5 37. a5 Kh7 38. Qd8 Kg7 39. Qb6 Kh7 40. a6 bxa6
41. Qxc6 Qe6 42. Rd6 1-0

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Matanovic, Aleksandar"]
[Result "1/2-1/2"]
[ECO "B65"]
[PlyCount "47"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8.
O-O-O O-O 9. f4 h6 10. Bh4 Nxd4 11. Qxd4 Qa5 12. e5 dxe5 13. Qxe5 Qxe5 14. fxe5
Nd5 15. Bxe7 Nxe7 16. Bd3 Nc6 17. Rhe1 Rd8 18. Be4 Bd7 19. Bf3 Be8 20. Nb5
Rxd1+ 21. Rxd1 Kf8 22. Nd6 Nxe5 23. Bxb7 Rb8 24. b3 1/2-1/2

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "8"]
[White "Filip, Miroslav"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A21"]
[PlyCount "81"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. c4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. Nc3 d6 7. d3 e5 8. Rb1 a5
9. a3 Nh5 10. Bd2 Nc6 11. Ne1 Ne7 12. b4 axb4 13. axb4 c6 14. b5 Be6 15. f4 e4
16. dxe4 Bxc4 17. bxc6 bxc6 18. Rb4 Bd4+ 19. Kh1 d5 20. exd5 cxd5 21. Nc2 Bc5
22. Ra4 Bb3 23. Rxa8 Qxa8 24. Qc1 Nf6 25. Be3 Qa7 26. Nb5 Bxe3 27. Qxe3 Qxe3
28. Nxe3 Rc8 29. Ra1 Ne4 30. Bf3 Nd2 31. Kg2 Ne4 32. g4 Rc5 33. Nd4 Rc3 34. Nf1
Bc4 35. Ra7 Kf8 36. Ng3 Nxg3 37. hxg3 Rc1 38. gxf5 gxf5 39. Ne6+ Ke8 40. Bh5+
Ng6 41. Rxh7 1-0

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Cardoso, Radolfo Tan"]
[Result "0-1"]
[ECO "B93"]
[PlyCount "62"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 Nc6 7. Nxc6 bxc6 8.
e5 Bg4 9. Be2 Bxe2 10. Qxe2 Ng8 11. exd6 Qxd6 12. O-O Nf6 13. Be3 e6 14. Rad1
Qc7 15. Bd4 Bd6 16. Ne4 Be7 17. Ng3 h5 18. Rd3 h4 19. Ne4 Rd8 20. Be5 Qb6+ 21.
Qf2 Qxf2+ 22. Nxf2 Nh5 23. Rfd1 f6 24. Rxd8+ Bxd8 25. Bd6 Bb6 26. Kf1 Kf7 27.
Rd3 f5 28. Be5 Nf6 29. Bxf6 Kxf6 30. Rd6 Rc8 31. Nd3 Ke7 0-1

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "10"]
[White "Gligoric, Svetozar"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E40"]
[PlyCount "57"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6 5. Bd3 e5 6. Nge2 exd4 7. exd4 d5 8. c5
Bxc3+ 9. bxc3 h6 10. O-O O-O 11. Ng3 b6 12. Ba3 Re8 13. Qf3 Be6 14. Rae1 Na5
15. Re5 Nd7 16. Re3 bxc5 17. dxc5 Qg5 18. Rfe1 Nf6 19. h3 Nc4 20. Bxc4 dxc4 21.
Bc1 Qd5 22. Qf4 Qxc5 23. Re5 Qf8 24. Qh4 Nd7 25. Rh5 f5 26. Bxh6 Qf6 27. Rg5 g6
28. Nh5 Qf7 29. Nf4 1-0

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Neikirkh, Oleg"]
[Result "1/2-1/2"]
[ECO "B45"]
[PlyCount "30"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8.
Nxc3 d5 9. exd5 Nxd5 10. Nxd5 exd5 11. Bd3 Ne5 12. O-O Nxd3 13. Qxd3 O-O 14.
Be3 Re8 15. Rad1 Be6 1/2-1/2

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "12"]
[White "Fuster, Geza"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C42"]
[PlyCount "75"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nbd7 5. Bg5 Be7 6. e3 O-O 7. Qc2 c6 8. Bd3
exd4 9. exd4 Re8 10. O-O Nf8 11. h3 h6 12. Be3 Ne6 13. Nh4 d5 14. c5 Nh5 15.
Nf3 Nef4 16. Bh7+ Kf8 17. Qd2 g5 18. Ne2 Nxe2+ 19. Qxe2 Nf6 20. Bc2 Ne4 21. Ne5
Bf6 22. Qh5 Bxe5 23. dxe5 Kg7 24. h4 Rh8 25. e6 Bxe6 26. Bd4+ f6 27. f3 Bf7 28.
Qg4 h5 29. Qh3 g4 30. fxg4 Qd7 31. Bxe4 dxe4 32. Bxf6+ Kg8 33. Rad1 Bd5 34.
Bxh8 Kxh8 35. Qc3+ Kg8 36. Rf5 hxg4 37. Rg5+ Kf8 38. Rf1+ $138 1-0

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Rossetto, Hector"]
[Result "1/2-1/2"]
[ECO "A26"]
[PlyCount "117"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 O-O 5. O-O d6 6. Nc3 Nc6 7. d3 e5 8. Rb1
Bg4 9. h3 Bd7 10. b4 Re8 11. e4 Nh5 12. b5 Ne7 13. Nh4 Nf6 14. Ne2 a6 15. a4
axb5 16. axb5 c6 17. bxc6 bxc6 18. Bb2 Qc7 19. Qc1 c5 20. f4 Nc6 21. f5 Qd8 22.
Bc3 Ra2 23. Rb2 Rxb2 24. Bxb2 Nb4 25. Qe3 Qe7 26. Bc1 Ba4 27. Bd2 Rb8 28. Qf3
Bc2 29. Nc1 Nh5 30. Rf2 Ba4 31. fxg6 fxg6 32. Nf5 Qf8 33. Qe2 Qd8 34. Nxg7 Nxg7
35. h4 Bd7 36. Qf3 Be6 37. Bg5 Qd7 38. Kh2 Nc6 39. Ne2 Bg4 40. Qe3 Rb2 41. Nc3
Rxf2 42. Qxf2 Qf7 43. Qa2 Nb4 44. Qa8+ Qf8 45. Qb7 Nh5 46. Nd5 Nxd5 47. Qxd5+
Kh8 48. Qb7 Nf6 49. Bxf6+ Qxf6 50. Qb2 Kg7 51. Qd2 h6 52. Kg1 Qd8 53. Kf2 Qb6
54. Bf3 Be6 55. Bd1 Qb1 56. Bf3 Qa1 57. Kg2 Qd4 58. Qe2 Qc3 59. Bg4 1/2-1/2

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "14"]
[White "Benko, Pal C"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A65"]
[PlyCount "83"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Bg5 c5 6. d5 h6 7. Be3 d6 8. f3 e6
9. Qd2 exd5 10. cxd5 Kh7 11. h4 h5 12. Be2 Re8 13. Nd1 Na6 14. Nf2 Qb6 15. Ngh3
Bxh3 16. Nxh3 Qb4 17. Qxb4 Nxb4 18. Kd2 Na6 19. Rab1 Nc7 20. Bf4 Bf8 21. b4 Nd7
22. Rhc1 b6 23. Nf2 Rab8 24. g4 Ne5 25. gxh5 gxh5 26. Nh1 Ng6 27. Bg5 Bh6 28.
Ng3 Nxh4 29. Bxh6 Kxh6 30. Rh1 Rg8 31. Rbg1 Rxg3 32. Rxg3 Ng6 33. f4 Nxf4 34.
Bxh5 Nxh5 35. Rgh3 Re8 36. Rxh5+ Kg7 37. bxc5 bxc5 38. Rg5+ Kf6 39. Rf5+ Ke7
40. Rb1 Rc8 41. Rb7 a6 42. a4 1-0

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "15"]
[White "De Greif, Boris"]
[Black "Fischer, Robert James"]
[Result "0-1"]
[ECO "B93"]
[PlyCount "69"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Qc7 8. Bd3
Nbd7 9. a4 b6 10. O-O Bb7 11. Kh1 g6 12. Qe1 Bg7 13. fxe5 dxe5 14. Qh4 O-O 15.
Ng5 h6 16. Nh3 g5 17. Bxg5 hxg5 18. Nxg5 Rfd8 19. Nd5 Bxd5 20. exd5 Nf8 21. c4
Rd6 22. Rae1 Re8 23. h3 Qe7 24. Ne4 Nxe4 25. Qxe4 Rf6 26. Rf5 Rxf5 27. Qxf5 a5
28. b3 Rd8 29. Rf1 Rd6 30. Qg4 Rf6 31. Rf5 Rxf5 32. Bxf5 Qf6 33. Qe4 Ng6 34. g3
Ne7 35. Bh7+ $138 0-1

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "16"]
[White "Bronstein, David I"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C76"]
[PlyCount "110"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. O-O g6 7. d4 Bg7 8. dxe5
dxe5 9. Bg5 Nge7 10. Qd3 h6 11. Be3 Be6 12. Qe2 O-O 13. Bc5 b5 14. Bb3 Bxb3 15.
axb3 Qc8 16. Nbd2 Rd8 17. b4 Qe6 18. Ra3 Nc8 19. Rfa1 Nb8 20. c4 c6 21. h3 Bf8
22. Bxf8 Kxf8 23. cxb5 cxb5 24. Nb3 Ne7 25. Nc5 Qf6 26. Rd1 Nec6 27. Rxd8+ Qxd8
28. Rd3 Qe7 29. Qd2 Kg7 30. Rd5 a5 31. bxa5 Rxa5 32. b4 Ra1+ 33. Kh2 Ra7 34.
Qc3 f6 35. Qd2 Kh7 36. Qc3 Rc7 37. g3 Ra7 38. g4 Rc7 39. h4 g5 40. Kg3 Ra7 41.
Rd1 Nd7 42. hxg5 Nxc5 43. g6+ Kxg6 44. bxc5 Rc7 45. Rd5 Kh7 46. Qd2 Qg7 47. Rd6
Ne7 48. Qa5 Rxc5 49. Qd8 Rc8 50. Qd7 Rc3 51. Kg2 Rc6 52. Rxc6 Nxc6 53. Qf5+ Kh8
54. Qc8+ Kh7 55. Qf5+ Kh8 1/2-1/2

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "17"]
[White "De Greif, Boris"]
[Black "Averbakh, Yuri L"]
[Result "1/2-1/2"]
[ECO "D41"]
[PlyCount "89"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. c4 Nf6 2. Nf3 e6 3. Nc3 d5 4. d4 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bc4 Nxc3 8.
bxc3 Be7 9. O-O O-O 10. Bd3 Bd7 11. Qe2 Rc8 12. Bb2 Qa5 13. Rfd1 Rfd8 14. Nd2
cxd4 15. exd4 Be8 16. Nc4 Qc7 17. a4 Nb8 18. Ba3 Bxa3 19. Rxa3 Nd7 20. a5 Nf6
21. Rb1 Rd5 22. a6 b6 23. Ne5 Rdd8 24. Qb2 Nd7 25. Nxd7 Rxd7 26. Bf1 Rcd8 27.
Re1 Rd6 28. Raa1 Bc6 29. Re3 Qe7 30. Rae1 Qf6 31. Re5 Rd5 32. Qc1 Rxe5 33. Rxe5
Rd5 34. Rxd5 exd5 35. Qe3 Qd6 36. g3 g6 37. h4 h5 38. Kh2 Bd7 39. Be2 Qe6 40.
Qd2 Qe4 41. Bf1 Bf5 42. Bg2 Qd3 43. Qf4 Qxa6 44. Bxd5 Qe2 45. c4 1/2-1/2

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "18"]
[White "Larsen, Bent"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "132"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. f4 Nf6 2. Nf3 g6 3. b4 Bg7 4. Bb2 O-O 5. e3 d6 6. Na3 b6 7. Be2 c5 8. bxc5
bxc5 9. O-O Nc6 10. Qe1 Rb8 11. Rb1 Be6 12. Nc4 Rb4 13. Bxf6 Bxf6 14. Rxb4 Nxb4
15. c3 Nc6 16. h4 Na5 17. Nxa5 Qxa5 18. Qg3 Qxa2 19. e4 Bc4 20. Bxc4 Qxc4 21.
e5 dxe5 22. fxe5 Bg7 23. Ra1 a6 24. h5 Rd8 25. Qh3 Qd3 26. Ra5 Bh6 27. hxg6
Qxg6 28. Ra4 Qb1+ 29. Kh2 Bg7 30. Rxa6 Qe4 31. Qg3 e6 32. Ra7 h6 33. Rc7 c4 34.
Kh3 Rd3 35. Qg4 Qxe5 36. Rxc4 Qb8 37. Rb4 Qc7 38. Rb5 Kf8 39. Qb4+ Kg8 40. Qe4
Rd8 41. Rb7 Qd6 42. c4 Rc8 43. Ra7 Qc5 44. Ra8 Rxa8 45. Qxa8+ Bf8 46. Qe4 Be7
47. Qf4 Bg5 48. Qb8+ Kh7 49. Qb5 Qc8 50. c5 e5+ 51. g4 Bf4 52. c6 h5 53. Qd3+
Kh8 54. Qd7 hxg4+ 55. Kh4 Qg8 56. Qxg4 Qd8+ 57. Kh5 Qf6 58. Qc8+ Kh7 59. c7
Qg6+ 60. Kh4 Qg3+ 61. Kh5 Qxf3+ 62. Qg4 Qh1+ 63. Qh4 Qc6 64. Kg4+ Kg7 65. Qd8
Qg2+ 66. Kh5 Qh3+ 0-1

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "19"]
[White "De Greif, Boris"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "A37"]
[PlyCount "88"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 c5 2. c4 g6 3. g3 Bg7 4. Bg2 Nc6 5. d3 a6 6. Nc3 Rb8 7. a4 d6 8. O-O Nh6
9. Bd2 Nf5 10. Rb1 O-O 11. Ne1 Bd7 12. Nc2 a5 13. Nb5 h5 14. Bg5 Ne5 15. e4 Nh6
16. h3 f5 17. f4 Nef7 18. Bh4 Bc6 19. Kh2 Qd7 20. Ne3 e6 21. b3 Nd8 22. Qd2 b6
23. Rbe1 Bb7 24. Qd1 Nc6 25. exf5 Nxf5 26. Nxf5 Rxf5 27. g4 hxg4 28. hxg4 Rf7
29. Be4 Ne7 30. Bxb7 Rxb7 31. Qe2 e5 32. Qg2 exf4 33. Bxe7 Rxe7 34. Qd5+ Kh8
35. Rf3 Be5 36. Rh3+ Rh7 37. Rxe5 Rxh3+ 38. Kxh3 dxe5 39. Qxe5+ Qg7 40. Qxf4
Rf7 41. Qe3 Qf8 42. Kg2 Qa8+ 43. Kg3 Qb8+ 44. Kg2 Rh7 0-1

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "20"]
[White "Panno, Oscar"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E28"]
[PlyCount "43"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. a3 Bxc3+ 6. bxc3 Qe7 7. Bd3 e5 8.
Ne2 d6 9. O-O Nc6 10. Ng3 e4 11. Bc2 Na5 12. f3 Nxc4 13. fxe4 Ng4 14. Qf3 Qf6
15. Bd3 Qh4 16. h3 Nge5 17. dxe5 Nxe5 18. Qf4 Qxf4 19. exf4 Nxd3 20. Be3 Nb2
21. Ra2 Nc4 22. Bc1 1/2-1/2

[Event "Portoroz Interzonal"]
[Site "Portoroz"]
[Date "1958.??.??"]
[Round "21"]
[White "De Greif, Boris"]
[Black "Olafsson, Fridrik"]
[Result "0-1"]
[ECO "E43"]
[PlyCount "104"]
[EventDate "1958.08.05"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 b6 7. O-O Bb7 8. Bd2
d6 9. a3 Bxc3 10. Bxc3 Nbd7 11. Qe2 Qc7 12. Rfd1 e5 13. dxe5 dxe5 14. Bf5 Rfe8
15. Nd2 e4 16. Bxd7 Nxd7 17. Qg4 Ne5 18. Qg3 f6 19. Nf1 Qf7 20. Bxe5 Rxe5 21.
b3 Rae8 22. a4 Bc8 23. h4 h6 24. Rd6 Kh7 25. Rad1 Qh5 26. R1d2 R8e7 27. Rd8 Bg4
28. Rf8 Bd7 29. Rd8 Be6 30. Qf4 Qf7 31. Nh2 Qg6 32. Nf1 Qf7 33. Nh2 g5 34. hxg5
hxg5 35. Qg3 Qh5 36. Rf8 Kg6 37. f4 exf3 38. Nxf3 Re4 39. Rdd8 Bf7 40. Rd6 R4e6
41. Rxe6 Rxe6 42. Qc7 Kg7 43. Ra8 Rxe3 44. Qd6 Re8 45. Rxa7 g4 46. Qd7 Kg8 47.
Nh4 g3 48. Nf3 Qg6 49. Qd1 Qe4 50. Rd7 Qe3+ 51. Kh1 Kg7 52. Rd8 Qh6+ 0-1

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "1"]
[White "Szukszta, Janusz"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E70"]
[BlackElo "2370"]
[PlyCount "35"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Poland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "POL"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. f3 c5 6. dxc5 b6 7. Be3 bxc5 8. Bxc5
Nc6 9. Nge2 Qa5 10. Be3 Ba6 11. Nd4 Nxd4 12. Bxd4 Rfc8 13. c5 Bxf1 14. Rxf1 e5
15. Be3 Bf8 16. Qa4 Qc7 17. Bg5 Qxc5 18. Rd1 1/2-1/2

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "2"]
[White "Arnlind, Erik"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C61"]
[BlackElo "2370"]
[PlyCount "38"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Sweden"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "SWE"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. O-O Nd4 5. Ba4 Qf6 6. c3 Nxf3+ 7. Qxf3 Qxf3
8. gxf3 Ne7 9. Rd1 Ng6 10. d4 Bd6 11. Be3 O-O 12. Nd2 Be7 13. Nc4 d6 14. dxe5
dxe5 15. Bd7 Rd8 16. Bxc8 Raxc8 17. a4 b6 18. Kf1 a6 19. Ke2 f6 1/2-1/2

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Van den Broeck, Hans"]
[Result "1/2-1/2"]
[ECO "C07"]
[WhiteElo "2370"]
[PlyCount "30"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Belgium"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "BEL"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nc6 5. exd5 Qxd5 6. Bc4 Qd8 7. dxc5 Bxc5 8.
O-O Nf6 9. Qe2 O-O 10. Nb3 Bd6 11. Bg5 e5 12. Nfd2 Bf5 13. Bxf6 Qxf6 14. Ne4
Qe7 15. Nxd6 Qxd6 1/2-1/2

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "4"]
[White "Kramer, Haije"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A87"]
[Annotator "ChessBase"]
[PlyCount "57"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1998.11.10"]
[WhiteTeam "Netherlands"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "COL"]

1. c4 f5 2. d4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 c6 8. Qb3 $6
Na6 9. Rd1 Qe8 (9... Qc7 10. d5 Nc5 11. Qc2 e5 12. dxe6 Bxe6 13. Bf4 Rad8 14.
Ng5 Qe7 $11 {Novotelnov-Hasin,Ab/URS 1956}) 10. c5+ Kh8 11. cxd6 exd6 12. Bf4
Ne4 13. Nxe4 fxe4 14. Ng5 d5 15. Bd6 Rf5 16. f4 h6 17. Nh3 Rf7 18. Be5 Be6 19.
Qe3 Kh7 20. Nf2 Qd7 21. Rac1 Nc7 22. b4 Nb5 23. a4 Nd6 24. Bxd6 Qxd6 25. b5
cxb5 26. axb5 Rc8 27. Rxc8 Bxc8 28. Qb3 Rc7 29. e3 1/2-1/2

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Bilek, Istvan"]
[Result "1/2-1/2"]
[ECO "B15"]
[WhiteElo "2370"]
[BlackElo "2485"]
[PlyCount "47"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Hungary"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "HUN"]

1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Nf6 5. Ng3 g6 6. Bc4 Bg7 7. O-O O-O 8.
d4 Bg4 9. c3 Nbd7 10. Re1 Nb6 11. Bb3 a5 12. a4 Nbd7 13. h3 Bxf3 14. Qxf3 Qb6
15. Bc4 Rae8 16. Bf4 Qd8 17. Rad1 Nb6 18. Bb3 Nbd5 19. Bc1 e6 20. Nf1 Qb6 21.
Bc2 Qc7 22. Ne3 Nxe3 23. Bxe3 Nd5 24. Bc1 1/2-1/2

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "6"]
[White "Koskinen, Heikki"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B31"]
[BlackElo "2370"]
[PlyCount "33"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Finland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FIN"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. Re1 O-O 7. d4 cxd4 8.
cxd4 d6 9. h3 a6 10. Bf1 e5 11. Nc3 exd4 12. Nxd4 d5 13. Nxc6 bxc6 14. exd5
Nxd5 15. Nxd5 cxd5 16. Qf3 Be6 17. Rd1 1/2-1/2

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Thorbergsson, Freysteinn"]
[Result "1/2-1/2"]
[ECO "C04"]
[WhiteElo "2370"]
[PlyCount "49"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Island"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ISL"]

1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 5. e5 Nd7 6. Bb5 a6 7. Bxc6 bxc6 8.
O-O c5 9. dxc5 Bxc5 10. Nb3 Be7 11. Na5 Nb8 12. Bd2 c5 13. a3 Qc7 14. b4 Nc6
15. Nxc6 Qxc6 16. bxc5 a5 17. Nd4 Qxc5 18. Qg4 Kf8 19. Bg5 Bxg5 20. Qxg5 Ba6
21. Qe3 Kg8 22. Rfd1 h6 23. Rab1 Kh7 24. Rb3 Rhc8 25. Qf4 1/2-1/2

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "8"]
[White "Smiltiner, Shlomo"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A39"]
[BlackElo "2370"]
[PlyCount "84"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Israel"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "ISR"]
[BlackTeamCountry "COL"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. g3 Bg7 5. Bg2 O-O 6. Nge2 c5 7. O-O Nc6 8. d4
cxd4 9. Nxd4 Nxd4 10. Qxd4 Be6 11. Qd3 Rc8 12. b3 a6 13. Be3 Ng4 14. Bd4 Ne5
15. Qd2 Qa5 16. Rac1 Nc6 17. Bxg7 Kxg7 18. f4 f6 19. Kh1 b5 20. cxb5 axb5 21.
Qb2 b4 22. Ne2 Qb6 23. h3 h5 24. Kh2 Rc7 25. f5 Bf7 26. fxg6 Bxg6 27. Rxc6 Qxc6
28. Nd4 Qc3 29. Qf2 Rfc8 30. g4 hxg4 31. hxg4 Rh8+ 32. Kg1 Rc5 33. g5 Rxg5 34.
Ne6+ Kh7 35. Nxg5+ fxg5 36. Re1 Qe5 37. Rc1 Kg7 38. Rc4 Qh2+ 39. Kf1 Rf8 40.
Bf3 Qxf2+ 41. Kxf2 g4 42. Rxb4 Rxf3+ 0-1

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Lemoine, Claude"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "2370"]
[PlyCount "52"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "France"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "FRA"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. d5 Ne8 8. O-O f5
9. Ne1 Nf6 10. f3 Nbd7 11. Nd3 f4 12. b4 g5 13. c5 Rf7 14. a4 Nf8 15. a5 h5 16.
Nf2 Ng6 17. Ba3 Bf8 18. h3 Rg7 19. Ra2 Nh4 20. Rd2 g4 21. fxg4 hxg4 22. hxg4
Nh5 23. Nh1 Nf6 24. Nf2 Nh5 25. Nh1 Nf6 26. Nf2 Nh5 1/2-1/2

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "10"]
[White "Enevoldsen, Jens"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B28"]
[WhiteElo "2350"]
[BlackElo "2370"]
[PlyCount "51"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Denmark"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "DEN"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. e5 Nd7 6. Bd3 Ne7 7. Na3 Nc6 8. Nc2 Be7
9. O-O O-O 10. Re1 c4 11. Bf1 b5 12. g3 a5 13. h4 h6 14. Bg2 Rb8 15. Ne3 f5 16.
exf6 Nxf6 17. Nh2 Qe8 18. Neg4 Nxg4 19. Nxg4 b4 20. Bf4 Rb7 21. Ne5 Nxe5 22.
Bxe5 Qg6 23. Re2 bxc3 24. bxc3 Bd7 25. Kh2 a4 26. Qc1 1/2-1/2

[Event "Munich ol (Men) fin-B"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Joyner, Lionel"]
[Result "1/2-1/2"]
[ECO "E95"]
[WhiteElo "2370"]
[PlyCount "23"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Canada"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "CAN"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Be2 O-O 6. Nf3 Nbd7 7. O-O e5 8. Re1
Re8 9. d5 Nc5 10. Bf1 a5 11. g3 Rf8 12. Nh4 1/2-1/2

[Event "Munich ol (Men) qual-C"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "1"]
[White "Golombek, Harry"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E81"]
[BlackElo "2370"]
[PlyCount "30"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "England"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "ENG"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 d6 3. Nc3 g6 4. e4 Bg7 5. f3 O-O 6. Be3 c6 7. Qd2 a6 8. Bh6 e5
9. Bxg7 Kxg7 10. O-O-O Qc7 11. d5 cxd5 12. cxd5 Bd7 13. Kb1 Rc8 14. Bd3 a5 15.
Nge2 Na6 1/2-1/2

[Event "Munich ol (Men) qual-C"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Beckingham"]
[Result "1/2-1/2"]
[ECO "B67"]
[WhiteElo "2370"]
[PlyCount "47"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "SCO"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8.
O-O-O Bd7 9. f4 h6 10. Bh4 Nxe4 11. Qe1 Nf6 12. Nf5 Be7 13. Nxd6+ Bxd6 14. Rxd6
Qc7 15. Qd2 O-O-O 16. Be2 Ne7 17. Bxf6 gxf6 18. Rd1 Nf5 19. Rd3 Bc6 20. g3 Rxd3
21. Qxd3 Rd8 22. Qxd8+ Qxd8 23. Rxd8+ Kxd8 24. Kd2 1/2-1/2

[Event "Munich ol (Men) qual-C"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "3"]
[White "Tarazi, Andre"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "B92"]
[BlackElo "2370"]
[PlyCount "68"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Lebanon"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "LBN"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nf3 a6 3. Nc3 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Be2 e5 7. Nb3 Be7 8. Be3
Be6 9. O-O O-O 10. f3 b5 11. Qd2 Nbd7 12. Kh1 Qc7 13. Bd3 Nb6 14. Qf2 Nfd7 15.
Rfd1 Rfc8 16. Nd2 b4 17. Ne2 d5 18. exd5 Nxd5 19. Be4 f5 20. Bxd5 Bxd5 21. Nb3
Be6 22. Rac1 a5 23. c3 Qb8 24. c4 a4 25. Na1 f4 26. Bd2 Nc5 27. Be1 Rd8 28. Qf1
Rxd1 29. Rxd1 Bxc4 30. Nc2 Qb5 31. Rd2 Rd8 32. Rxd8+ Bxd8 33. Bxb4 Bxe2 34. Qf2
Bb6 0-1

[Event "Munich ol (Men) qual-C"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Bertholdt, Dieter"]
[Result "1/2-1/2"]
[ECO "E55"]
[WhiteElo "2370"]
[PlyCount "40"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "German Dem Rep"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "DDR"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4
b6 9. Qe2 Bb7 10. Rd1 cxd4 11. exd4 Nbd7 12. Bd3 Rc8 13. Bd2 Bd6 14. Nb5 Bb8
15. Bb4 Re8 16. Nd6 Bxd6 17. Bxd6 Nf8 18. Be5 Qe7 19. Rac1 Rxc1 20. Rxc1 Rc8
1/2-1/2

[Event "Munich ol (Men) qual-C"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "5"]
[White "Borja, Meliton"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E54"]
[BlackElo "2370"]
[PlyCount "81"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Philippines"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "PHI"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 dxc4 7. Bxc4 O-O 8. O-O
b6 9. a3 cxd4 10. exd4 Bxc3 11. bxc3 Qc7 12. Qe2 Bb7 13. Ne5 Bd5 14. Bxd5 exd5
15. Bb2 Nc6 16. c4 Na5 17. cxd5 Nxd5 18. Rac1 Qd6 19. Qf3 f6 20. Ng4 Nc6 21.
Ne3 Nce7 22. Rfe1 Rad8 23. a4 Rfe8 24. Nc4 Qd7 25. Ba3 Qf5 26. Qb3 Nc6 27.
Rxe8+ Rxe8 28. Ne3 Nxd4 29. Qc4 Qe4 30. Rd1 Nf3+ 31. gxf3 Qxc4 32. Nxc4 Nc3 33.
Rd7 Nxa4 34. Nd6 Re1+ 35. Kg2 g6 36. Ne4 Nc5 37. Nxf6+ Kf8 38. Rxa7 h5 39.
Bxc5+ bxc5 40. Nd7+ Kg8 41. Nxc5 1-0

[Event "Munich ol (Men) qual-C"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Witkowski, Stefan"]
[Result "0-1"]
[ECO "D88"]
[WhiteElo "2370"]
[PlyCount "66"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Poland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "POL"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8.
Ne2 cxd4 9. cxd4 Nc6 10. Be3 O-O 11. O-O Na5 12. Bd3 Nc6 13. Bc4 Na5 14. Bd3
Nc6 15. Bc4 Bg4 16. f3 Na5 17. Rc1 Nxc4 18. Rxc4 Bd7 19. Qb3 a6 20. Rd1 Bb5 21.
Rc2 Bxe2 22. Rxe2 Qd7 23. Qb6 Rfc8 24. Rb1 Rc3 25. e5 Rb8 26. Bf2 e6 27. Be1
Rc6 28. Qb2 Rc4 29. Bb4 Rxd4 30. Bc5 Rd5 31. Ba7 Rc8 32. Qxb7 Rc1+ 33. Kf2 Rxb1
0-1

[Event "Munich ol (Men) qual-C"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "8"]
[White "Portisch, Lajos"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2640"]
[BlackElo "2370"]
[PlyCount "43"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Hungary"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "HUN"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 Nxd5 5. Nf3 c5 6. e4 Nxc3 7. bxc3 cxd4 8.
cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Be2 b6 12. O-O Bb7 13. Qf4 Qf6 14. Qxf6
gxf6 15. e5 fxe5 16. dxe5 Nd7 17. Rfe1 Rfd8 18. Rad1 Nf8 19. Ng5 h6 20. Nh3
Rxd1 21. Rxd1 Bd5 22. Nf4 1/2-1/2

[Event "Munich ol (Men) qual-C"]
[Site "Munich"]
[Date "1958.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Eliskases, Erich Gottlieb"]
[Result "1/2-1/2"]
[ECO "E15"]
[WhiteElo "2370"]
[PlyCount "39"]
[EventDate "1958.09.30"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Argentina"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ARG"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 c6 6. Bg2 d5 7. O-O Nbd7 8. Nbd2
Be7 9. Bb2 O-O 10. Re1 b5 11. c5 b4 12. Qc2 Bb5 13. a4 bxa3 14. Rxa3 Qc7 15. b4
a5 16. Rxa5 Rxa5 17. bxa5 Qxa5 18. Ra1 Qc7 19. e3 Rb8 20. Bc3 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Spassky, Boris V"]
[Result "0-1"]
[ECO "D02"]
[PlyCount "54"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 d5 2. Nf3 Nc6 3. Bf4 Bg4 4. e3 e6 5. Be2 Nf6 6. Ne5 Nxe5 7. Bxe5 Bxe2 8.
Qxe2 c6 9. O-O Be7 10. Nd2 O-O 11. Bxf6 Bxf6 12. c4 Be7 13. Rfc1 Bd6 14. c5 Bc7
15. f4 f6 16. Qg4 Qe7 17. Rf1 e5 18. fxe5 fxe5 19. Rxf8+ Rxf8 20. Rf1 Re8 21.
Kh1 Qe6 22. Qf3 Bd8 23. b4 Bf6 24. Nb3 exd4 25. exd4 Qe2 26. Qf4 Qc4 27. g4 h6
0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "2"]
[White "Ciocaltea, Victor"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A05"]
[PlyCount "75"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 Nc6 3. d3 d6 4. g3 g6 5. Bg2 Bg7 6. O-O Nf6 7. Nbd2 O-O 8. Re1
Ne8 9. Nc4 b5 10. Ne3 Rb8 11. Nd2 Bd7 12. f4 b4 13. Ndc4 Nc7 14. f5 Nb5 15. Rf1
Nbd4 16. Kh1 Kh8 17. g4 Ne5 18. Nd5 Nxc4 19. dxc4 Nc6 20. Rb1 Ne5 21. b3 h6 22.
g5 hxg5 23. Bxg5 f6 24. Bf4 Be8 25. Bxe5 fxe5 26. Qg4 Bf6 27. fxg6 Kg7 28. Bh3
Rb7 29. Ne3 Bd7 30. Qg2 Rh8 31. Bxd7 Qxd7 32. Nf5+ Kg8 33. Rbd1 Qe6 34. Qg4 Qd7
35. g7 Rh7 36. Qg6 Bxg7 37. Rg1 e6 38. Rxd6 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Milev, Zdravko"]
[Result "1/2-1/2"]
[ECO "C80"]
[PlyCount "50"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. Nxe5
Nxe5 9. dxe5 Bb7 10. c3 Bc5 11. Qe2 Qe7 12. Be3 Bxe3 13. Qxe3 O-O 14. f3 Nc5
15. Nd2 f5 16. f4 Ne6 17. Nf3 c5 18. Rad1 Rad8 19. Ng5 Nxg5 20. fxg5 g6 21. Qf4
Kg7 22. h4 Rfe8 23. Rfe1 Qc7 24. Kf2 Qc6 25. Re2 Bc8 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "4"]
[White "Siero"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "B44"]
[PlyCount "81"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Be3 Nf6 6. Bd3 d5 7. Nxc6 bxc6 8.
e5 Nd7 9. Bf4 Qb6 10. O-O Qd4 11. Qd2 Nxe5 12. Nc3 Nxd3 13. cxd3 Ba6 14. Rad1
Be7 15. Rfe1 O-O 16. a3 Bf6 17. h3 e5 18. Bh2 Rfe8 19. Ne2 Qb6 20. Nc3 Qb3 21.
f4 exf4 22. Bxf4 c5 23. Rxe8+ Rxe8 24. Re1 Re6 25. Kh2 Bc8 26. Rc1 Bb7 27. Nd1
Bd4 28. Be3 Be5+ 29. Bf4 Bd4 30. Be3 Bxe3 31. Nxe3 Qb6 32. Kh1 h6 33. d4 c4 34.
Rf1 Re4 35. Rd1 Qe6 36. Re1 Bc6 37. Nc2 g5 38. Rxe4 Qxe4 39. Ne1 Bd7 40. Nf3
Bxh3 41. Kh2 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Haag, Ervin"]
[Result "0-1"]
[ECO "B27"]
[PlyCount "80"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Be3 Nf6 6. Qd2 Nc6 7. d5 Nb4 8. e5
Ng4 9. Bf4 f6 10. exf6 Nxf6 11. d6 Nbd5 12. Nxd5 Qxd2+ 13. Bxd2 Nxd5 14. O-O-O
e6 15. h4 Nf6 16. Bc3 b6 17. Ng5 O-O 18. f3 Bb7 19. Bc4 Nd5 20. Bxg7 Kxg7 21.
Rde1 Bc6 22. Ne4 h6 23. Rhf1 Nf4 24. Rf2 Rf7 25. Re3 Raf8 26. Ng3 Nd5 27. Ra3
a5 28. Rb3 a4 29. Ra3 Rf4 30. Bxd5 Bxd5 31. h5 g5 32. Rd2 g4 33. fxg4 Rxg4 34.
Re3 Rf6 35. a3 Kf8 36. b3 Bc6 37. Kb2 Rff4 38. c3 axb3 39. Kxb3 Ba4+ 40. Kb2
Bc6 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "6"]
[White "Cobo Arteaga, Eldis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B35"]
[PlyCount "81"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Be3 Nf6 6. Nd2 cxd4 7. Nb3 Qd8 8.
Nxd4 Nc6 9. Bc4 O-O 10. f3 Qa5 11. Qd2 Qb4 12. Bb3 Nxd4 13. Qxd4 Qxd4 14. Bxd4
d6 15. O-O-O Bd7 16. e5 dxe5 17. Bxe5 Bc6 18. Nd5 Nxd5 19. Bxg7 Kxg7 20. Bxd5
Bxd5 21. Rxd5 Rfd8 22. Rhd1 Rxd5 23. Rxd5 Kf6 24. Kd2 Ke6 25. c4 Rc8 26. Kc3 f6
27. b4 g5 28. a4 h5 29. Kd4 f5 30. h3 h4 31. c5 b6 32. Re5+ Kf6 33. Re2 bxc5+
34. bxc5 Rd8+ 35. Kc4 e5 36. Kb5 Ke6 37. Ka6 Rc8 38. Kb5 Rb8+ 39. Ka6 Rc8 40.
Kb5 Rb8+ 41. Kc4 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Pietzsch, Wolfgang"]
[Result "1/2-1/2"]
[ECO "E14"]
[PlyCount "47"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 Be7 6. Nc3 d5 7. O-O O-O 8. b3
Ne4 9. Bb2 Nd7 10. cxd5 exd5 11. Qc2 f5 12. Ne2 Bd6 13. Ne5 g6 14. f3 Nec5 15.
dxc5 Bxe5 16. Bxe5 Nxe5 17. b4 Qe7 18. Rac1 Rfe8 19. Nd4 bxc5 20. bxc5 Nc6 21.
Rfe1 Nxd4 22. exd4 Qf6 23. Qf2 Ba6 24. Bxa6 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "8"]
[White "Pachman, Ludek"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E98"]
[PlyCount "57"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. Be2 e5 7. O-O Nc6 8. d5
Ne7 9. Ne1 Nd7 10. Nd3 f5 11. exf5 gxf5 12. f4 Ng6 13. Be3 Nf6 14. fxe5 dxe5
15. Qd2 a6 16. Bg5 Qe8 17. Rae1 e4 18. Nf4 Ne5 19. c5 Kh8 20. h3 Bd7 21. Nd1
Qf7 22. Ne3 Rae8 23. b4 Bc8 24. Rd1 Ng6 25. Ne6 Bxe6 26. dxe6 Qxe6 27. Nxf5 Ng8
28. Nxg7 Kxg7 29. Rxf8 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Gligoric, Svetozar"]
[Result "0-1"]
[ECO "D40"]
[PlyCount "100"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. e3 d5 5. Nc3 Nc6 6. Bd3 cxd4 7. exd4 dxc4 8.
Bxc4 Be7 9. O-O O-O 10. a3 Nd5 11. Qd3 a6 12. Ba2 Bf6 13. Ne4 Nce7 14. Bg5 Bxg5
15. Nexg5 Ng6 16. Rfe1 Bd7 17. Bxd5 exd5 18. h4 h6 19. h5 hxg5 20. hxg6 f6 21.
Nh4 gxh4 22. Qf3 Be8 23. Qh5 Bxg6 24. Qxg6 Re8 25. Qh5 Qd7 26. Qxh4 Qf5 27. Qg3
Rac8 28. Rxe8+ Rxe8 29. Rc1 Re4 30. Qb8+ Kh7 31. Qh2+ Kg6 32. Qg3+ Rg4 33. Qe3
Qe4 34. Qxe4+ Rxe4 35. Rc7 b5 36. Ra7 Rxd4 37. Rxa6 Rd1+ 38. Kh2 Rd2 39. b4
Rxf2 40. Rb6 Kf5 41. Rxb5 Ke4 42. a4 Ra2 43. a5 d4 44. Rb7 d3 45. Rxg7 d2 46.
Rd7 Ke3 47. Re7+ Kd3 48. Rd7+ Kc2 49. Rc7+ Kb1 50. Rd7 Kc1 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "10"]
[White "Gonzalez Zamora, Juan Carlos"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "E70"]
[PlyCount "102"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Bg5 h6 6. Be3 d6 7. f3 b6 8. g4 c5
9. d5 e6 10. h4 exd5 11. cxd5 h5 12. Bg5 Qe8 13. Nge2 b5 14. gxh5 Nxh5 15. Qd2
b4 16. Nd1 Nd7 17. Bh6 Ne5 18. Bg2 Nd3+ 19. Kf1 Ba6 20. Bxg7 Kxg7 21. Kg1 Qe5
22. Rb1 Ndf4 23. Nxf4 Nxf4 24. Rh2 Ne2+ 25. Kh1 Rh8 26. Ne3 Qf4 27. Nf1 Rxh4
28. Qxf4 Rxf4 29. Ne3 Rh8 30. Ng4 Ng3+ 31. Kg1 Nxe4 32. Re1 Rxh2 33. Kxh2 Nf6
34. Re7 Nxd5 35. Rxa7 Bb5 36. Kg3 Rd4 37. a4 bxa3 38. bxa3 Ra4 39. Rxa4 Bxa4
40. f4 Nf6 41. Ne3 Nh5+ 42. Kg4 Nf6+ 43. Kg5 Bb3 44. Bc6 d5 45. a4 d4 46. Nf1
Bd5 47. Bxd5 Nxd5 48. Nd2 Ne3 49. a5 c4 50. a6 c3 51. Nb3 d3 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Smyslov, Vassily"]
[Result "1/2-1/2"]
[ECO "D93"]
[PlyCount "45"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 c6 6. h3 O-O 7. Nf3 b6 8. Qb3 e6
9. Be2 Bb7 10. cxd5 exd5 11. O-O Nbd7 12. Rfd1 Nh5 13. Bd6 Re8 14. a4 a5 15.
Rac1 Re6 16. Bh2 Rc8 17. Ne1 Nhf6 18. Nd3 Bf8 19. Ne5 Bb4 20. Nxd7 Nxd7 21. Bg4
f5 22. Bf3 Kg7 23. Ne2 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "12"]
[White "Guimard, Carlos Enrique"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E60"]
[PlyCount "69"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. d5 Na5 8. Nfd2
c5 9. a3 Ne8 10. Ra2 b6 11. b4 Nb7 12. Bb2 Bd7 13. Bxg7 Kxg7 14. Nc3 Nc7 15.
Qa1 Kg8 16. Rb1 Rb8 17. h4 h6 18. Nce4 Na6 19. e3 Bf5 20. Rb3 f6 21. Qd1 Qe8
22. Qf3 Bd7 23. Nc3 Nd8 24. Qe2 Nf7 25. e4 h5 26. Ra1 Nh6 27. Re1 Qf7 28. f4
Ng4 29. Nf3 Qg7 30. e5 Bf5 31. Nb5 Rb7 32. exd6 exd6 33. Nxd6 Rd7 34. Nxf5 gxf5
35. Qe6+ 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B92"]
[PlyCount "73"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O
O-O 9. Bg5 Nbd7 10. a4 b6 11. Bc4 Bb7 12. Qd3 Qc7 13. Bxf6 Nxf6 14. Nd2 Nh5 15.
Nd5 Bxd5 16. Bxd5 Nf4 17. Qc4 Nxd5 18. exd5 Qb7 19. Qb3 Rab8 20. c4 Qc7 21. Qd3
f5 22. b4 Bg5 23. Rfc1 e4 24. Qe2 a5 25. Rab1 axb4 26. Rxb4 Rfe8 27. Rcb1 e3
28. Nf1 f4 29. fxe3 fxe3 30. Ng3 Bf6 31. Rb5 Bd4 32. Rd1 Bc5 33. Rb2 Ra8 34.
Ra2 Qd7 35. Rf1 Rxa4 36. Rxa4 Qxa4 37. Kh1 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "14"]
[White "Jimenez Zerquera, Eleazar"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C63"]
[PlyCount "29"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 Nf6 5. exf5 Bc5 6. Qe2 Qe7 7. O-O e4 8.
Bxc6 bxc6 9. Ng5 d5 10. Ne6 Bxe6 11. fxe6 Qxe6 12. d3 Bd4 13. Be3 Bxe3 14. fxe3
O-O 15. Rae1 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "15"]
[White "De Greif, Boris"]
[Black "Garcia, Gilberto"]
[Result "1-0"]
[ECO "B60"]
[PlyCount "107"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 Bd7 7. Bxf6 gxf6 8.
Qd2 h5 9. f4 a6 10. O-O-O Bh6 11. g3 Rc8 12. Nf5 Bf8 13. Kb1 b5 14. Qe3 Nb4 15.
a3 Nc6 16. b4 Rb8 17. Bg2 a5 18. Nd5 axb4 19. axb4 Qc8 20. Qc3 Kd8 21. Nxd6
exd6 22. Qxf6+ Ke8 23. Qxh8 Be6 24. Qc3 Qb7 25. e5 Rc8 26. Nf6+ Kd8 27. Qc5 Kc7
28. Rxd6 Bxd6 29. Qxd6+ Kb6 30. Qc5+ Kc7 31. Rd1 Kb8 32. Qd6+ Ka7 33. Rd3 Qb6
34. Ra3+ Kb7 35. Qc5 Qxc5 36. bxc5 Rd8 37. Ne4 Bd5 38. Bf3 Nd4 39. c6+ Kxc6 40.
Ra6+ Kc7 41. Bh1 Ne2 42. Kb2 h4 43. Ra1 hxg3 44. hxg3 Rh8 45. Nf2 Be6 46. Ne4
b4 47. Nd6 Nxg3 48. Ra7+ Kb6 49. Rb7+ Ka6 50. Bc6 b3 51. cxb3 Bc8 52. Bb5+ Ka5
53. Nxc8 Rxc8 54. b4+ 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "16"]
[White "Alvarez del Monte, Jose Luis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C97"]
[PlyCount "48"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 Rfe8 14. Ne3 g6 15.
dxe5 dxe5 16. b3 Rad8 17. Qe2 Bc6 18. Ng4 Nxg4 19. hxg4 Bd7 20. Nh2 f6 21. Be3
Be6 22. Red1 Rxd1+ 23. Rxd1 Rd8 24. Rxd8+ Qxd8 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "17"]
[White "De Greif, Boris"]
[Black "Perez Perez, Francisco Jose"]
[Result "1/2-1/2"]
[ECO "E91"]
[PlyCount "30"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 Bg4 7. O-O Nfd7 8. Be3
c5 9. d5 a6 10. Ne1 Bxe2 11. Qxe2 e5 12. Nd3 Nb6 13. b3 f5 14. f3 N8d7 15. Nf2
Rf7 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "18"]
[White "Matanovic, Aleksandar"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E66"]
[PlyCount "83"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nf3 Nc6 7. d5 Na5 8. Nd2
c5 9. O-O e5 10. Qc2 a6 11. b3 Ne8 12. e4 Rb8 13. Bb2 b5 14. Nd1 f5 15. exf5
Bxf5 16. Be4 Bh3 17. Bg2 Bf5 18. Qc3 bxc4 19. bxc4 Qb6 20. Qe3 Qb4 21. Rc1 Nf6
22. h3 Qa4 23. g4 Bc8 24. Rc3 Qb4 25. Ba3 Qb6 26. Rc1 Bd7 27. Nc3 Qc7 28. Nce4
Nxe4 29. Nxe4 Rf4 30. Qc3 h5 31. gxh5 Bf5 32. Nxd6 e4 33. Qd2 Qxd6 34. Bxc5
Qxc5 35. Qxf4 Rd8 36. hxg6 Bxg6 37. Bxe4 Rf8 38. Qg4 Bxe4 39. Qxe4 Nb7 40. Qe3
Bd4 41. Qe6+ Rf7 42. Kh1 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "19"]
[White "De Greif, Boris"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "A24"]
[PlyCount "60"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 e5 7. d3 a5 8. Bd2 c6
9. a3 Re8 10. Ne1 Be6 11. b4 axb4 12. axb4 Rxa1 13. Qxa1 d5 14. cxd5 cxd5 15.
Qa7 Qc8 16. b5 Nbd7 17. Nf3 d4 18. Na2 Qa8 19. Qxa8 Rxa8 20. Nb4 Ra5 21. Ng5
Rxb5 22. Nxe6 fxe6 23. Ra1 Bf8 24. Bf3 Bxb4 25. Rb1 Bxd2 26. Rxb5 b6 27. h4 Ba5
28. g4 Nc5 29. g5 Nd5 30. Rb2 Nc3 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "20"]
[White "De Greif, Boris"]
[Black "Ortega, Rogelio"]
[Result "1/2-1/2"]
[ECO "E46"]
[PlyCount "78"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Nge2 O-O 6. a3 Be7 7. cxd5 exd5 8.
Nf4 c6 9. g3 Nbd7 10. Bg2 Ne8 11. O-O Nb6 12. b3 f5 13. a4 a5 14. Ba3 Nf6 15.
Bxe7 Qxe7 16. Nd3 g5 17. Ne5 Be6 18. f4 g4 19. Ne2 Rfc8 20. Qd3 Nbd7 21. Rfc1
Nb8 22. Qc3 Nbd7 23. Rab1 Ne8 24. b4 Nd6 25. bxa5 Ra7 26. Qa3 Nf6 27. Qb4 Rca8
28. Rc5 Qd8 29. Nc1 Rxa5 30. Rxa5 Rxa5 31. Nb3 Ra8 32. Nc5 Bc8 33. Qb6 Qe7 34.
a5 Nc4 35. Nxc4 dxc4 36. e4 fxe4 37. Qb4 Nd5 38. Qxc4 Rxa5 39. Nxe4 Be6 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1962.??.??"]
[Round "21"]
[White "Polugaevsky, Lev"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "D61"]
[PlyCount "67"]
[EventDate "1962.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Nbd7 5. e3 Be7 6. Nf3 O-O 7. Qc2 h6 8. Bh4
c6 9. Rd1 a6 10. Bd3 b5 11. c5 e5 12. dxe5 Ne8 13. Bg3 Nxc5 14. Bh7+ Kh8 15.
Nd4 Qb6 16. O-O Nc7 17. f4 Bg4 18. Rd2 b4 19. Nd1 Nb5 20. Nf2 Bd7 21. Qb1 b3
22. a3 g6 23. Bxg6 fxg6 24. Qxg6 Nxd4 25. Qxh6+ Kg8 26. Qg6+ Kh8 27. exd4 Na4
28. e6 Be8 29. Qh6+ Kg8 30. f5 Bf6 31. Ng4 Bxd4+ 32. Kh1 Ra7 33. Rxd4 Qxd4 34.
Be5 1-0

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Cobo Arteaga, Eldis"]
[Result "0-1"]
[ECO "E12"]
[PlyCount "60"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 Be7 6. e3 O-O 7. Bd3 c5 8. O-O
cxd4 9. exd4 d5 10. Bxf6 Bxf6 11. cxd5 exd5 12. Qb3 Nc6 13. Qxd5 Qxd5 14. Nxd5
Bxd4 15. Rac1 Bc5 16. Rfd1 Rad8 17. Be4 Nb4 18. Ne7+ Bxe7 19. Bxb7 Nxa2 20.
Rxd8 Rxd8 21. Rc8 Rxc8 22. Bxc8 Bf6 23. b3 Nc1 24. b4 Na2 25. b5 Nc3 26. Bd7
Kf8 27. Kf1 Ke7 28. Bc6 Kd6 29. Nd2 a5 30. bxa6 Kxc6 0-1

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "2"]
[White "Jimenez Zerquera, Eleazar"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D25"]
[PlyCount "46"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. Bxc4 e6 6. Qb3 Bxf3 7. gxf3 Nbd7 8.
Nc3 Nb6 9. Be2 Be7 10. O-O O-O 11. Rd1 Qc8 12. e4 c5 13. Be3 cxd4 14. Bxd4 Bc5
15. Be5 Rd8 16. Qb5 Rxd1+ 17. Rxd1 a6 18. Qd3 Qc6 19. Bg3 Be7 20. f4 Rd8 21.
Qc2 Rxd1+ 22. Bxd1 Bb4 23. Qd3 Qd7 1/2-1/2

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "4"]
[White "Cadena, Juan Manuel"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D73"]
[PlyCount "78"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. Nd2 d5 3. Ngf3 g6 4. g3 Bg7 5. Bg2 c5 6. c3 cxd4 7. cxd4 O-O 8.
O-O Nc6 9. b3 Qb6 10. Bb2 Bf5 11. Rc1 Rac8 12. a3 a5 13. Re1 Rfe8 14. e3 Be4
15. Qe2 Na7 16. Rc5 Nd7 17. Rxc8 Rxc8 18. Nxe4 dxe4 19. Nd2 Rc2 20. Bc1 f5 21.
Qd1 Rc8 22. Nc4 Qc7 23. a4 b5 24. axb5 Nxb5 25. Bb2 e6 26. Bf1 Bf8 27. d5 Bb4
28. dxe6 Nf8 29. e7 Qxe7 30. Qd5+ Qe6 31. Rd1 Qxd5 32. Rxd5 Nc7 33. Nb6 Nxd5
34. Nxc8 Ne6 35. Bc4 Ndc7 36. Nb6 Kf8 37. Nd5 Nxd5 38. Bxd5 Nc7 39. Bc4 Ne8
1/2-1/2

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Letelier Martner, Rene"]
[Result "1/2-1/2"]
[ECO "B27"]
[PlyCount "122"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 g6 2. e4 Bg7 3. Nf3 c5 4. c3 Qc7 5. Na3 Na6 6. Bc4 cxd4 7. cxd4 f5 8. e5
d5 9. exd6 Qxd6 10. O-O Nf6 11. Qb3 e6 12. Nb5 Qb6 13. Ng5 O-O 14. Bxe6+ Kh8
15. Bxc8 Raxc8 16. Ne6 Rfe8 17. Nxg7 Kxg7 18. Bf4 Ne4 19. a4 g5 20. Be5+ Kg6
21. a5 Qe6 22. Qxe6+ Rxe6 23. Rac1 Rec6 24. Rxc6+ Rxc6 25. f3 Nd2 26. Rd1 Nc4
27. Nxa7 Re6 28. f4 gxf4 29. Bxf4 Nxb2 30. Rb1 Nd3 31. g3 Nab4 32. Nc8 Ra6 33.
Bd2 Rxa5 34. Rxb4 Ra1+ 35. Kg2 Nxb4 36. Bxb4 Rb1 37. Bc5 b5 38. Ne7+ Kf7 39.
Nc6 Rb2+ 40. Kf3 Rxh2 41. d5 Rd2 42. Nb4 Rd1 43. Ke2 Ra1 44. Nd3 Ra2+ 45. Ke3
Rc2 46. Bd6 Kf6 47. Be5+ Ke7 48. Kf4 b4 49. Kxf5 b3 50. Bb2 Kd7 51. Be5 Ke7 52.
Nb2 Rf2+ 53. Ke4 Re2+ 54. Kf4 Rd2 55. Ke4 Re2+ 56. Kf4 Rd2 57. d6+ Ke6 58. Ke3
Rxd6 59. Bxd6 Kxd6 60. Kf4 Ke6 61. Kg5 Kf7 1/2-1/2

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Ortega, Rogelio"]
[Result "1-0"]
[ECO "E28"]
[PlyCount "77"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d6 6. a3 Bxc3+ 7. bxc3 e5 8. Ne2
Nc6 9. O-O Re8 10. f3 h6 11. e4 Ne7 12. f4 c5 13. fxe5 dxe5 14. d5 Ng6 15. Ng3
b5 16. h3 bxc4 17. Bxc4 Rb8 18. Qd3 Qd6 19. Qf3 Rb6 20. Nh5 Qe7 21. Be3 Bd7 22.
Rab1 Nh4 23. Nxf6+ Rxf6 24. Qe2 Rc8 25. Rb7 Rd6 26. Kh2 Kh7 27. g3 Ng6 28. Qh5
Qe8 29. Rxa7 Rb6 30. Rf2 Rb1 31. a4 Rcb8 32. Bb5 Bxb5 33. Rfxf7 Rb2+ 34. Kg1
Rb1+ 35. Kg2 Bf1+ 36. Kf3 Be2+ 37. Kxe2 R8b2+ 38. Bd2 Rxd2+ 39. Kxd2 1-0

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "7"]
[White "Vergara, Alejandro"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "B74"]
[PlyCount "120"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Nf6 6. Nc3 Bg7 7. Be2 O-O 8.
Nb3 a5 9. a4 d6 10. f4 Be6 11. O-O Qc8 12. Nd5 Bxd5 13. exd5 Nb4 14. c4 e6 15.
dxe6 Qxe6 16. Bd4 Rfe8 17. Bf3 Nc6 18. f5 gxf5 19. Bxf6 Qxf6 20. Bd5 Re3 21.
Rb1 Qg6 22. Kh1 Rae8 23. g4 R8e5 24. gxf5 Rxf5 25. Rg1 Rg5 26. Rf1 Rf5 27. Rg1
Rg5 28. Qd2 Ree5 29. Qf4 Ref5 30. Qe4 Re5 31. Qf4 Ref5 32. Qd2 Re5 33. Rxg5
Rxg5 34. Rf1 Bf6 35. Qf2 Kg7 36. Qd2 Rf5 37. Rg1 Rg5 38. Rxg5 Bxg5 39. Qd1 Bf4
40. Qf3 Qb1+ 41. Kg2 Qxb2+ 42. Kf1 Ne5 43. Qg2+ Qxg2+ 44. Kxg2 b6 45. Nd4 Ng6
46. h3 Be5 47. Ne2 f5 48. Kf3 Kf6 49. Bb7 h5 50. Bd5 h4 51. Bb7 Nf8 52. Ke3 Ne6
53. Bc6 Bb2 54. Bb7 Ba3 55. Bc6 Ng5 56. Bg2 Ke5 57. Kd3 Bc5 58. Nc3 f4 59. Nd5
f3 60. Bf1 Ne4 0-1

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Foguelman, Alberto"]
[Result "0-1"]
[ECO "D82"]
[PlyCount "80"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 c5 6. dxc5 Qa5 7. Qa4+ Qxa4 8.
Nxa4 Ne4 9. f3 Bd7 10. fxe4 Bxa4 11. exd5 Bxb2 12. Rb1 Bc3+ 13. Kf2 Nd7 14. Ne2
Ba5 15. Rxb7 Nxc5 16. Rb8+ Rxb8 17. Bxb8 O-O 18. Bxa7 Nd3+ 19. Kg1 Ra8 20. Ng3
Bc2 21. Bd4 Bb4 22. h4 Rxa2 23. Ne4 Nc1 24. Ng5 Nb3 25. Nf3 Be4 26. Ng5 Bf5 27.
Nf3 Rc2 28. Kh2 f6 29. Rg1 Bd6+ 30. Kh1 Bg3 31. c5 Be4 32. Nh2 Bf2 33. d6 Nxd4
34. dxe7 Kf7 35. e8=Q+ Kxe8 36. exd4 Bxd4 37. Bb5+ Kd8 38. Nf3 Bxg1 39. Kxg1
Bxf3 40. gxf3 Rxc5 0-1

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "9"]
[White "Etcheverry, E."]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E91"]
[PlyCount "84"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 Bg4 7. h3 Bxf3 8. Bxf3
Nfd7 9. Be3 c5 10. d5 Na6 11. O-O Nc7 12. Be2 e5 13. dxe6 Nxe6 14. Qxd6 Nd4 15.
Rad1 Rc8 16. Bxd4 cxd4 17. Nb5 Nc5 18. e5 d3 19. Bf3 a6 20. Qxd8 Rcxd8 21. Nd6
Bxe5 22. Nxb7 Nxb7 23. Bxb7 Bxb2 24. Bd5 Rde8 25. Rxd3 Re2 26. Rfd1 Rfe8 27.
Kf1 Kg7 28. c5 Rc2 29. c6 Re7 30. Bf3 Rc1 31. Rxc1 Bxc1 32. Rb3 Bf4 33. Ra3 a5
34. Rd3 Bc7 35. g4 g5 36. Bd5 Kf6 37. f3 h6 38. Be4 Ke5 39. Kf2 Bb6+ 40. Kg3
Bc7 41. Rd5+ Kf6+ 42. Kf2 Re5 1/2-1/2

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Garcia, Gilberto"]
[Result "1-0"]
[ECO "D82"]
[PlyCount "52"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 c5 5. dxc5 Qa5 6. cxd5 Bg7 7. Qd2 O-O 8. e4
Qxc5 9. Bd3 Na6 10. Nf3 e6 11. Bxa6 bxa6 12. O-O Rd8 13. Bg5 Rd7 14. Rac1 Qa5
15. Rfd1 Bb7 16. Bxf6 Bxf6 17. Qf4 Bxc3 18. Rxc3 exd5 19. Ne5 Re7 20. Qf6 Qa4
21. b3 Qe8 22. f4 dxe4 23. Ng4 h5 24. Nh6+ Kh7 25. Nf5 Qh8 26. Qxh8+ Rxh8 1-0

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "11"]
[White "Lopez, Mario D"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "B34"]
[PlyCount "112"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nxc6 bxc6 6. Qd4 f6 7. Bc4 e6 8.
Nc3 Nh6 9. O-O Nf7 10. Bb3 Bg7 11. Be3 O-O 12. Rad1 Qa5 13. Qc5 Qxc5 14. Bxc5
Rd8 15. Be7 Re8 16. Bc5 f5 17. exf5 gxf5 18. Rfe1 d5 19. f4 Ba6 20. Re3 Kh8 21.
Rg3 Rg8 22. Re1 Bc8 23. Na4 Nd8 24. c3 Nb7 25. Bf2 Bd7 26. Nc5 Nxc5 27. Bxc5
Bf6 28. Rxg8+ Kxg8 29. Re3 a5 30. Bd1 Rb8 31. Rg3+ Kh8 32. b3 Rb5 33. b4 Rb8
34. bxa5 Rb1 35. Rd3 Bc8 36. Bd4 Kg7 37. Rd2 Ba6 38. Kf2 c5 39. Bxf6+ Kxf6 40.
Ba4 Ke7 41. g3 Kd6 42. Be8 Bb5 43. Bxb5 Rxb5 44. g4 fxg4 45. Kg3 Rxa5 46. Kxg4
Ra3 47. Rc2 d4 48. cxd4 cxd4 49. h4 Kd5 50. Re2 d3 51. Re5+ Kd6 52. Kf3 Rxa2
53. Rh5 Rh2 54. Kg3 d2 55. Kxh2 d1=Q 56. Rg5 Qf3 0-1

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Calero, Carlos"]
[Result "1/2-1/2"]
[ECO "E85"]
[PlyCount "75"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. dxe5 dxe5 8. Qxd8
Rxd8 9. Nd5 Nxd5 10. cxd5 c6 11. Bc4 b5 12. Bb3 Bb7 13. Rc1 a5 14. dxc6 Bxc6
15. Nh3 a4 16. Bd1 Rc8 17. Be2 Nd7 18. O-O Nf8 19. Rfd1 Bd7 20. Nf2 Rxc1 21.
Rxc1 Ne6 22. Kf1 Bf8 23. Nd3 f6 24. Nc5 Nxc5 25. Bxc5 Rc8 26. Be3 Rxc1+ 27.
Bxc1 Bc5 28. b3 a3 29. Bd2 Bd4 30. Bb4 Bb2 31. Ke1 Be6 32. Bxb5 Bxb3 33. Bxa3
Bc3+ 34. Ke2 Bxa2 35. Kd3 Ba5 36. Bc4+ Bxc4+ 37. Kxc4 Kf7 38. Kd5 1/2-1/2

[Event "Pan American-ch"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "13"]
[White "Estrada Degrandi, Walter"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D02"]
[PlyCount "31"]
[EventDate "1963.??.??"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 d5 2. Nf3 Nc6 3. Bf4 Bg4 4. Nbd2 e6 5. c3 Nf6 6. e3 a6 7. Bd3 Bd6 8. Qc2
Bh5 9. O-O Bg6 10. Bg3 O-O 11. Bxg6 hxg6 12. e4 Nh5 13. Rae1 Qd7 14. exd5 exd5
15. Bxd6 cxd6 16. h3 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "1"]
[White "Ortega, Rogelio"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E98"]
[PlyCount "71"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. Be2 e5 7. O-O Nc6 8. d5
Ne7 9. Ne1 Nd7 10. Nd3 f5 11. exf5 gxf5 12. f4 Nf6 13. Be3 Ng6 14. fxe5 dxe5
15. Qd2 f4 16. Bc5 Re8 17. Rae1 Bf5 18. Bd1 Bh6 19. Nf2 Nd7 20. Ba3 Qh4 21. Bf3
Bf8 22. Bxf8 Rxf8 23. Nce4 Kh8 24. Kh1 Rg8 25. Qc3 Qe7 26. Nd3 Rg7 27. c5 Re8
28. b4 Nf6 29. d6 Qe6 30. Ng5 Qxa2 31. Nxe5 Nxe5 32. Rxe5 Qc2 33. Rxe8+ Nxe8
34. Nf7+ Kg8 35. Qxc2 Bxc2 36. d7 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Broderman, Jose"]
[Result "1-0"]
[ECO "E14"]
[PlyCount "79"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. c4 Be7 5. Nc3 Bb7 6. Bd3 d5 7. b3 Nbd7 8. O-O
Ne4 9. Bb2 O-O 10. Qc2 f5 11. Ne2 Bd6 12. Ne5 g6 13. Nf4 Qe7 14. cxd5 exd5 15.
Nc6 Qf7 16. Rac1 Bxf4 17. exf4 Rfe8 18. f3 Nef6 19. Ne5 Nxe5 20. fxe5 Nh5 21.
Qxc7 Nf4 22. Qxf7+ Kxf7 23. Bb5 Rec8 24. Rfe1 Ne6 25. Kf2 a6 26. Bf1 b5 27. Ke3
Bc6 28. Ba3 f4+ 29. Kd3 a5 30. Bc5 b4 31. Kc2 Bb5 32. Kb2 Rab8 33. Ba7 Rxc1 34.
Rxc1 Rb7 35. Bxb5 Rxa7 36. Bc6 Nc7 37. Kc2 Ra6 38. Kd3 Ke6 39. Rc5 g5 40. Bb7
1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "3"]
[White "Pachman, Ludek"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B27"]
[PlyCount "85"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. c3 cxd4 5. cxd4 d5 6. exd5 Nf6 7. Bb5+ Nbd7 8.
d6 exd6 9. Qe2+ Qe7 10. Bf4 Qxe2+ 11. Bxe2 d5 12. Nc3 O-O 13. O-O Nb6 14. Rac1
Bg4 15. h3 Bxf3 16. Bxf3 Rac8 17. Rfe1 Rfe8 18. Rxe8+ Rxe8 19. Nb5 Ne4 20. Rc7
a6 21. Rxb7 axb5 22. Rxb6 Bxd4 23. Rxb5 Bxf2+ 24. Kh2 Rd8 25. g4 Bd4 26. a4 Nc5
27. a5 Nd3 28. Rb8 Rxb8 29. Bxb8 Nxb2 30. a6 Nc4 31. a7 Bxa7 32. Bxa7 Ne5 33.
Bxd5 h6 34. Kg3 Nd7 35. Be3 Kg7 36. Kf4 f6 37. Bd4 Nf8 38. h4 Nh7 39. Bc4 Kf8
40. h5 Kg7 41. hxg6 Nf8 42. Kf5 Nxg6 43. Bxf6+ 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Jimenez Zerquera, Eleazar"]
[Result "1/2-1/2"]
[ECO "E19"]
[PlyCount "51"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2
Nxc3 9. Qxc3 d6 10. b3 Nd7 11. Bb2 Qc8 12. Rad1 f5 13. Qe3 Rf6 14. Ng5 Bxg2 15.
Kxg2 Nf8 16. d5 Rg6 17. Nxe6 Nxe6 18. dxe6 Qxe6 19. Qxe6+ Rxe6 20. e3 Kf7 21.
Rd5 g6 22. h4 h5 23. Rfd1 a5 24. a4 Rb8 25. R5d3 Re8 26. Kf3 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "5"]
[White "Barcza, Gedeon"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E66"]
[PlyCount "67"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nf3 Nc6 7. O-O a6 8. d5
Na5 9. b3 c5 10. Bb2 Rb8 11. Nd2 b5 12. Qc2 bxc4 13. bxc4 Nd7 14. Rab1 Ne5 15.
Nd1 Bd7 16. f4 Rxb2 17. Nxb2 Ng4 18. Nd1 Bd4+ 19. Kh1 Ne3 20. Nxe3 Bxe3 21. Nb3
Nxb3 22. Qxb3 Bd4 23. e3 Bf6 24. Qb6 Qxb6 25. Rxb6 a5 26. h3 h5 27. Rfb1 Ba4
28. Be4 Kg7 29. Kg2 Ra8 30. Rb8 Rxb8 31. Rxb8 Bc3 32. Rb7 Kf6 33. g4 hxg4 34.
hxg4 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Tal, Mihail"]
[Result "0-1"]
[ECO "E91"]
[PlyCount "102"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 Bg4 7. h3 Bxf3 8. Bxf3
Nfd7 9. Be3 Nc6 10. O-O e5 11. d5 Nd4 12. Nb5 Nxf3+ 13. Qxf3 f5 14. Nc3 f4 15.
Bd2 Nf6 16. g4 fxg3 17. Qxg3 Rf7 18. f3 Qf8 19. Ne2 Bh6 20. Qe1 Nh5 21. Kg2
Bxd2 22. Qxd2 Qe7 23. Rg1 Raf8 24. Raf1 Qh4 25. Qe3 b6 26. Kh2 Nf4 27. Nxf4
Rxf4 28. Qe2 Qh6 29. Rg4 Rxg4 30. fxg4 Rxf1 31. Qxf1 Qd2+ 32. Qg2 Qf4+ 33. Kg1
Qc1+ 34. Qf1 Qe3+ 35. Kh2 Kg7 36. Qg2 Qf4+ 37. Kg1 Qc1+ 38. Qf1 Qe3+ 39. Kh2
Qxe4 40. b3 g5 41. Qd1 Kg6 42. Kg3 Qe3+ 43. Kg2 e4 44. Qa1 Qf3+ 45. Kh2 Qf2+
46. Kh1 Qg3 47. Qf1 Qf3+ 48. Qxf3 exf3 49. Kg1 Kf6 50. Kf2 Ke5 51. Kxf3 Kd4 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "7"]
[White "Perez Perez, Francisco Jose"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "D25"]
[PlyCount "87"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. Bxc4 e6 6. Qb3 Bxf3 7. gxf3 Nbd7 8.
Qxb7 c5 9. Nc3 cxd4 10. exd4 Be7 11. Bf4 O-O 12. Bc7 Qc8 13. Ba6 Qxb7 14. Bxb7
Rae8 15. O-O Nb6 16. Rac1 Nfd5 17. Nxd5 Nxd5 18. Bxd5 exd5 19. Rc2 Rc8 20. Rfc1
Rfe8 21. Be5 Rxc2 22. Rxc2 f6 23. Bg3 Bf8 24. Rc7 Re7 25. Rc6 Re1+ 26. Kg2 Kf7
27. Ra6 Rd1 28. Rxa7+ Kg6 29. Ra4 Kf5 30. Bc7 g5 31. Bb6 Bd6 32. Ra5 Ke6 33.
Ra6 Kd7 34. Bc5 Bf4 35. b4 Rd2 36. Ra7+ Ke6 37. a4 h5 38. a5 h4 39. h3 Kf5 40.
Kf1 Rd1+ 41. Ke2 Rd2+ 42. Ke1 Rd3 43. Rd7 Rxf3 44. a6 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "8"]
[White "O'Kelly de Galway, Alberic"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D55"]
[PlyCount "46"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. c4 e6 2. Nf3 Nf6 3. Nc3 d5 4. d4 Be7 5. Bg5 O-O 6. e3 h6 7. Bxf6 Bxf6 8.
cxd5 exd5 9. Qc2 c5 10. dxc5 Qa5 11. Be2 Qxc5 12. O-O Nc6 13. Rac1 Qa5 14. Rfd1
Be6 15. a3 Rac8 16. Qb1 a6 17. Bd3 Rfd8 18. Bf5 Bxf5 19. Qxf5 Ne7 20. Qd3 Bxc3
21. Rxc3 Rxc3 22. Qxc3 Qxc3 23. bxc3 Rc8 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Trifunovic, Petar"]
[Result "1/2-1/2"]
[ECO "E14"]
[PlyCount "27"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. c4 Bb7 5. Bd3 d5 6. O-O dxc4 7. Bxc4 Be7 8. Nc3
O-O 9. Qe2 c5 10. dxc5 Bxc5 11. b3 Nbd7 12. Bb2 Rc8 13. Rfd1 Qe7 14. Ba6
1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "10"]
[White "Kortschnoj, Viktor"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "D40"]
[PlyCount "55"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Bd3 c5 8. O-O
dxc4 9. Bxc4 cxd4 10. exd4 Nb6 11. Bb3 Nbd5 12. Qe2 b6 13. Nxd5 exd5 14. Rfe1
Be6 15. Ne5 Bd6 16. Rac1 Rc8 17. Rxc8 Qxc8 18. Bxf6 gxf6 19. Nd3 Kh8 20. Qf3
Qd8 21. Nf4 Bxf4 22. Qxf4 Rg8 23. Bd1 Rg6 24. Bh5 Rg5 25. Bf3 Rf5 26. Qe3 Qg8
27. h4 h5 28. Be2 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Robatsch, Karl"]
[Result "0-1"]
[ECO "B47"]
[PlyCount "118"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. g3 Nf6 7. Bg2 Nc6 8. O-O
Be7 9. Kh1 O-O 10. f4 d5 11. e5 Nxd4 12. Qxd4 Nd7 13. Be3 f6 14. Bh3 f5 15. Rf2
Bc5 16. Qd3 Nb6 17. Bd4 Bd7 18. Nd1 Bb5 19. Qe3 Nc4 20. Qc3 Rac8 21. a4 Bxd4
22. Qxd4 Be8 23. c3 Na5 24. Ra3 Nc6 25. Qd2 d4 26. cxd4 Nxd4 27. Qxd4 Rd8 28.
Qe3 Rxd1+ 29. Rf1 Rxf1+ 30. Bxf1 Bxa4 31. Rc3 Bc6+ 32. Bg2 Rd8 33. Bxc6 bxc6
34. Rd3 Rd5 35. Rxd5 cxd5 36. Qd2 Qc4 37. Kg1 d4 38. Kf2 d3 39. Qc3 Qd5 40. Ke3
Qe4+ 41. Kd2 Qe2+ 42. Kc1 h6 43. Qd2 Qf3 44. b4 Qe4 45. Kb2 Qd4+ 46. Kb3 Kh7
47. Ka2 Qc4+ 48. Kb2 Kg6 49. Qc3 Qe4 50. Qd2 Kh5 51. Kc3 g5 52. h3 gxf4 53.
gxf4 Kh4 54. Qa2 Qc6+ 55. Kxd3 Qf3+ 56. Kd4 Qxf4+ 57. Kc5 Qxe5+ 58. Kb6 Qb8+
59. Kc6 Qxb4 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "12"]
[White "Ivkov, Borislav"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C92"]
[PlyCount "145"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O Nf6 6. c3 Be7 7. Re1 O-O 8. h3
Nd7 9. d4 b5 10. Bb3 Bf6 11. a4 Bb7 12. Na3 Nb6 13. d5 Ne7 14. axb5 axb5 15.
Be3 Qd7 16. Qe2 Ba6 17. Nc2 Na4 18. Nb4 Bb7 19. Rec1 Nc5 20. Bc2 Ng6 21. Kh2
Be7 22. Qd1 Rfb8 23. g3 h6 24. Rxa8 Rxa8 25. Ra1 Qe8 26. Qf1 Rxa1 27. Qxa1 Qa8
28. Qf1 c6 29. dxc6 Bxc6 30. Nxc6 Qxc6 31. Nd2 Nf8 32. b4 Na6 33. Qa1 Nc7 34.
Nb3 Qc4 35. Na5 Qe2 36. Qd1 Qxd1 37. Bxd1 Nfe6 38. h4 Kf8 39. Be2 d5 40. exd5
Nxd5 41. Bd2 Nec7 42. Nc6 Bf6 43. c4 bxc4 44. Bxc4 Ke8 45. b5 Nb6 46. Be2 Ncd5
47. Bf3 Kd7 48. Kh3 Kd6 49. Na5 Be7 50. Bc1 Kc7 51. Nc4 Nxc4 52. Bxd5 Na3 53.
Bxf7 Nxb5 54. Kg4 Bc5 55. f3 Kd8 56. Kh5 Ke7 57. Kg6 Kf8 58. h5 Nd6 59. Be6 Ne8
60. Bb2 Bd6 61. g4 Nc7 62. Bf7 Nb5 63. f4 Bc5 64. Bc4 Bd4 65. Bc1 Nc3 66. Ba3+
Ke8 67. Kxg7 exf4+ 68. Kxh6 f3 69. Kg6 Ne4 70. Bb5+ Kd8 71. h6 f2 72. Kf7 Nd6+
73. Bxd6 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Wade, Robert Graham"]
[Result "1/2-1/2"]
[ECO "D45"]
[PlyCount "32"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c6 5. e3 Nbd7 6. Qc2 a6 7. a4 Be7 8. b3 O-O
9. Bd3 c5 10. O-O b6 11. Ne5 Bb7 12. Bb2 Rc8 13. cxd5 cxd4 14. exd4 Nxd5 15.
Bxh7+ Kh8 16. Be4 N7f6 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "14"]
[White "Geller, Efim P"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "D35"]
[PlyCount "79"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. e3 Bf5 7. Qf3 Bg6 8.
Bxf6 Qxf6 9. Qxf6 gxf6 10. Kd2 Nd7 11. Bd3 Bd6 12. h4 h5 13. Nge2 Bxd3 14. Kxd3
Rg8 15. g3 f5 16. Rhc1 Ke7 17. Rc2 Nf6 18. Nc1 Ne4 19. Ke2 Rae8 20. Nd3 Kf6 21.
Re1 Re7 22. Kf1 Kg6 23. b4 a5 24. a3 Ra8 25. Ne2 Kh6 26. Rb1 axb4 27. axb4 Ra3
28. Ndf4 Bxf4 29. Nxf4 Nd6 30. b5 Nc4 31. bxc6 bxc6 32. Rb8 Raxe3 33. Rc8 Re1+
34. Kg2 R1e6 35. Nxe6 fxe6 36. Rxc6 Kg7 37. Kf3 e5 38. Re2 f4 39. gxf4 e4+ 40.
Kg3 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "15"]
[White "De Greif, Boris"]
[Black "Letelier Martner, Rene"]
[Result "0-1"]
[ECO "A31"]
[PlyCount "61"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nf3 c5 3. c4 cxd4 4. Nxd4 a6 5. Nc3 d5 6. e3 e6 7. cxd5 Nxd5 8.
Qb3 Nxc3 9. bxc3 Nd7 10. Ba3 Nc5 11. Bxc5 Bxc5 12. Be2 O-O 13. O-O Qc7 14. Bf3
Rb8 15. a4 Bd6 16. g3 Rd8 17. Rfd1 Bd7 18. Rd2 Qa5 19. Ne2 Be7 20. Qd1 Qc7 21.
Rb1 Bf6 22. Rb4 g6 23. Qb1 Kg7 24. h4 a5 25. Rxb7 Bc6 26. Bxc6 Rxb7 27. Qxb7
Qxb7 28. Bxb7 Rxd2 29. Ba6 e5 30. Kg2 Be7 31. c4 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "16"]
[White "Calero, Ivan"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C51"]
[PlyCount "111"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 Na5 7. Nxe5 Nxc4 8.
Nxc4 d5 9. exd5 Qxd5 10. Ne3 Qd8 11. O-O Nf6 12. Ba3 O-O 13. Bxe7 Qxe7 14. Nd2
c6 15. Re1 Be6 16. Nf3 Qc7 17. Qd2 Qa5 18. Qb2 Rab8 19. a3 Nd5 20. Nxd5 Bxd5
21. Ne5 Qc7 22. Re3 f6 23. Nd3 Rbe8 24. Rae1 Rxe3 25. Rxe3 Qb6 26. Qc1 Bf7 27.
h3 Re8 28. Nc5 Rxe3 29. fxe3 Qc7 30. Nd3 Qg3 31. Qe1 Qxe1+ 32. Nxe1 Bg6 33. Kf2
Kf7 34. Kf3 Ke6 35. e4 Kd6 36. Nc2 c5 37. Kf4 cxd4 38. cxd4 b5 39. g4 Bf7 40.
Ke3 g5 41. Kd2 h5 42. Ne3 hxg4 43. Nf5+ Kd7 44. hxg4 Bg6 45. Ng3 a5 46. Kd3 Bf7
47. d5 Kd6 48. Kd4 Bg6 49. Nh5 Ke7 50. Kc5 b4 51. axb4 axb4 52. d6+ Ke6 53.
Kxb4 Kxd6 54. Nxf6 Ke5 55. Nd7+ Kxe4 56. Nf8 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "17"]
[White "De Greif, Boris"]
[Black "Uhlmann, Wolfgang"]
[Result "0-1"]
[ECO "D93"]
[PlyCount "84"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Nf3 c5 7. dxc5 Qa5 8. Rc1
Rd8 9. Qb3 Qxc5 10. Be2 Nc6 11. O-O dxc4 12. Qxc4 Qb6 13. Qb5 Qxb5 14. Bxb5 Bd7
15. h3 a6 16. Be2 Bf5 17. Rcd1 Ne4 18. Rxd8+ Rxd8 19. Na4 e5 20. Bh2 Be6 21. b3
Nb4 22. Bxe5 Nxa2 23. Rd1 Rxd1+ 24. Bxd1 b5 25. Nb2 Bxe5 26. Nxe5 Nd2 27. Nc6
Bxb3 28. Bxb3 Nxb3 29. Kf1 Nc3 30. Ke1 a5 31. Nd1 Nd5 32. e4 Nf4 33. Nc3 b4 34.
Na4 Ne6 35. Kd1 Ned4 36. Nxd4 Nxd4 37. Kd2 Ne6 38. Ke3 b3 39. Kd2 Nf4 40. Kc3
Nxg2 41. Kxb3 Nf4 42. h4 h5 0-1

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "18"]
[White "Garcia, Gilberto"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E12"]
[PlyCount "65"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 Bb4 6. a3 Bxc3+ 7. bxc3 h6 8.
Bh4 g5 9. Bg3 Ne4 10. Nd2 Nxg3 11. hxg3 d6 12. e4 e5 13. Qf3 Nd7 14. Qe3 Qf6
15. Be2 exd4 16. cxd4 c5 17. Nb3 Qe7 18. Bd3 O-O-O 19. O-O h5 20. Rfe1 f6 21.
a4 h4 22. g4 a5 23. Rab1 Nb8 24. e5 fxe5 25. Bf5+ Kc7 26. Nxa5 Nc6 27. Nxb7
Kxb7 28. Be4 Ra8 29. Qb3 Qc7 30. dxc5 dxc5 31. Qb5 Rhd8 32. a5 Ra6 33. Qxc5 1-0

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "19"]
[White "De Greif, Boris"]
[Black "Bobotsov, Milko G"]
[Result "1/2-1/2"]
[ECO "D01"]
[PlyCount "129"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nc3 d5 3. Bg5 c5 4. e3 e6 5. Nf3 Nc6 6. a3 h6 7. Bh4 g5 8. Bg3 Nh5
9. Be5 f6 10. Bd3 fxe5 11. Bg6+ Ke7 12. Bxh5 e4 13. Ne5 Nxe5 14. dxe5 Bg7 15.
f4 exf3 16. O-O Rf8 17. Rxf3 Bxe5 18. Qd3 Rxf3 19. Bxf3 Bd7 20. Qh7+ Kd6 21.
Rd1 Bxc3 22. bxc3 g4 23. Bxg4 Qg5 24. Qe4 Kc7 25. Qf4+ Qxf4 26. exf4 b5 27. Re1
Kd6 28. Re5 Rf8 29. g3 a5 30. Kf2 a4 31. Re1 Rb8 32. Rb1 Be8 33. Ke3 Bg6 34.
Kd2 Bf5 35. Be2 Kc6 36. g4 Bg6 37. Bd3 Bxd3 38. cxd3 Rd8 39. d4 b4 40. axb4
cxd4 41. b5+ Kc5 42. b6 a3 43. Kd3 dxc3 44. Kxc3 Rc8 45. b7 Rb8 46. h4 d4+ 47.
Kd3 a2 48. Ra1 Rxb7 49. Rxa2 Rb3+ 50. Kd2 Rh3 51. Ra6 Kd5 52. h5 Rh4 53. Kd3
Rxg4 54. Ra5+ Kd6 55. Ke4 Rh4 56. Ra6+ Ke7 57. Ra7+ Kf6 58. Rh7 Rxh5 59. Kxd4
Rh1 60. Ke4 Re1+ 61. Kf3 Rf1+ 62. Kg3 Kg6 63. Re7 Kf5 64. Rf7+ Ke4 65. Rf6
1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "20"]
[White "Cobo Arteaga, Eldis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A39"]
[PlyCount "28"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 Nf6 2. c4 c5 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. d4 cxd4 7. Nxd4 Nc6 8.
Nc3 Nxd4 9. Qxd4 d6 10. b3 Be6 11. Bb2 Nd5 12. Qd2 Nxc3 13. Bxc3 Bxc3 14. Qxc3
Qc7 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Havana"]
[Date "1963.??.??"]
[Round "21"]
[White "De Greif, Boris"]
[Black "Darga, Klaus"]
[Result "0-1"]
[ECO "E96"]
[PlyCount "79"]
[EventDate "1963.08.25"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. O-O Nbd7 8. Re1
c6 9. Rb1 exd4 10. Nxd4 Re8 11. Bf1 a5 12. f3 Nc5 13. Be3 Nfd7 14. Qd2 Be5 15.
g3 Bg7 16. Rbd1 a4 17. Qc2 Qa5 18. Kg2 Ne5 19. f4 Ng4 20. Bg1 Nf6 21. Nf3 a3
22. b3 Bg4 23. h3 Bxf3+ 24. Kxf3 h5 25. Rxd6 Nfxe4 26. Rxe4 Bxc3 27. Rxe8+ Rxe8
28. Rxg6+ Bg7 29. Rxg7+ Kxg7 30. Bd4+ Kg8 31. Qf5 Nxb3 32. Qxa5 Nxa5 33. Bc3
Rd8 34. Bxa5 Rd1 35. Be2 Ra1 36. Bc3 Rxa2 37. c5 Rc2 38. Be5 a2 39. Ke3 Rxc5
40. Bd4 0-1

[Event "Havana ol (Men) qual-G"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "1"]
[White "Benis, Ahmed"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "B21"]
[BlackElo "2370"]
[PlyCount "60"]
[EventDate "1966.10.23"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Marocco"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "MAR"]
[BlackTeamCountry "COL"]

1. e4 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qd1 g6 5. Nc3 Bg7 6. Bd2 Nf6 7. Nf3 d6 8.
Be2 O-O 9. O-O a6 10. a3 b5 11. Qc1 Bb7 12. Bd3 Na5 13. Bg5 Rc8 14. Bh6 Nc4 15.
Bxg7 Kxg7 16. Re1 Qb6 17. h3 Rc5 18. Re2 Rfc8 19. Bxc4 Rxc4 20. Qe1 e5 21. Rd1
b4 22. axb4 Qxb4 23. Nd2 Rd4 24. Rb1 Qb6 25. Re3 a5 26. Nb3 Rb4 27. Ra1 Ra8 28.
Na4 Qc7 29. f3 Bc6 30. Nc3 a4 0-1

[Event "Havana ol (Men) qual-G"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "2"]
[White "Bobotsov, Milko G"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A35"]
[WhiteElo "2455"]
[BlackElo "2370"]
[PlyCount "81"]
[EventDate "1966.10.23"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Bulgaria"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "BUL"]
[BlackTeamCountry "COL"]

1. c4 c5 2. Nc3 Nc6 3. Nf3 g6 4. e3 Bg7 5. d4 d6 6. d5 Ne5 7. Nxe5 Bxe5 8. e4
Bg7 9. Bd3 Nf6 10. Bg5 O-O 11. f4 Nd7 12. O-O a6 13. a4 Bf6 14. Bxf6 exf6 15.
Qd2 Re8 16. Rae1 b6 17. Qf2 Ra7 18. Re3 Nf8 19. Rfe1 Rae7 20. Qh4 Kg7 21. g4
Nd7 22. Rh3 Rh8 23. Qh6+ Kg8 24. Rhe3 Qf8 25. Qh4 h5 26. g5 fxg5 27. Qxg5 f6
28. Qg2 Qh6 29. Rf1 Nf8 30. Ree1 Rhh7 31. Kh1 Rhf7 32. Qg3 h4 33. Qg2 g5 34.
Be2 Rg7 35. fxg5 Rxg5 36. Qf2 Bh3 37. Rg1 Reg7 38. Rxg5 Qxg5 39. Rg1 Qxg1+ 40.
Qxg1 Rxg1+ 41. Kxg1 1/2-1/2

[Event "Havana ol (Men) qual-G"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "3"]
[White "Kanko, Ilkka"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E86"]
[BlackElo "2370"]
[PlyCount "61"]
[EventDate "1966.10.23"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Finland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FIN"]
[BlackTeamCountry "COL"]

1. c4 Nf6 2. Nc3 g6 3. d4 Bg7 4. e4 O-O 5. Be3 d6 6. f3 e5 7. Nge2 c6 8. Qd2
Nbd7 9. d5 cxd5 10. Nxd5 Nxd5 11. cxd5 f5 12. Nc3 f4 13. Bf2 a6 14. a4 Qg5 15.
Nb1 Qd8 16. Na3 Bf6 17. Nc4 Be7 18. b4 b6 19. Bd3 a5 20. bxa5 bxa5 21. O-O Qc7
22. Rfc1 Nc5 23. Nxe5 Bf6 24. Bxc5 dxc5 25. d6 Qg7 26. d7 Bxd7 27. Nxd7 Bxa1
28. Qa2+ Rf7 29. Rxa1 Qd4+ 30. Kh1 Qxd7 31. Bc4 1/2-1/2

[Event "Havana ol (Men) qual-G"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Anastasopoulos, Anastasios"]
[Result "1-0"]
[ECO "A15"]
[WhiteElo "2370"]
[PlyCount "99"]
[EventDate "1966.10.23"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Greece"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "GRE"]

1. Nf3 Nf6 2. c4 g6 3. b3 Bg7 4. Bb2 d6 5. g3 O-O 6. Bg2 e5 7. O-O Nc6 8. d3
Re8 9. Nbd2 Bd7 10. h3 Qc8 11. Kh2 h6 12. e4 g5 13. Re1 Ne7 14. Nf1 Ng6 15. Ne3
Rb8 16. Rc1 c5 17. Bc3 Bf8 18. b4 a6 19. a4 b6 20. Ra1 Ne7 21. Qd2 cxb4 22.
Bxb4 Nc6 23. Bc3 Nd8 24. Reb1 Ne6 25. Nf5 Nc5 26. g4 Ne6 27. Ng1 Nf4 28. Ne2
Nxe2 29. Qxe2 d5 30. exd5 Bxf5 31. gxf5 Qxf5 32. Be4 Qf4+ 33. Kg2 Bc5 34. Qf3
Nxe4 35. dxe4 Qxf3+ 36. Kxf3 a5 37. Rd1 Bd6 38. Rac1 Rec8 39. Bd2 Kg7 40. Be3
Kg6 41. Rc2 f5 42. Rb1 f4 43. Rxb6 fxe3 44. Rxd6+ Kh5 45. fxe3 Rf8+ 46. Kg2 Rb3
47. c5 Rxe3 48. c6 Rff3 49. c7 Rg3+ 50. Kf1 1-0

[Event "Havana ol (Men) qual-G"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Colon Romero, Miguel"]
[Result "1/2-1/2"]
[ECO "E12"]
[WhiteElo "2370"]
[PlyCount "31"]
[EventDate "1966.10.23"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Puerto Rico"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "PUR"]

1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. Nc3 Bb7 5. Bg5 Be7 6. e3 Ne4 7. Bxe7 Qxe7 8.
Nxe4 Bxe4 9. Be2 O-O 10. O-O c5 11. Nd2 Bb7 12. Bf3 d6 13. Qe2 Nc6 14. dxc5
dxc5 15. Rad1 Rad8 16. Nb1 1/2-1/2

[Event "Havana ol (Men) qual-G"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "6"]
[White "Ghitescu, Theodor"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D42"]
[WhiteElo "2450"]
[BlackElo "2370"]
[PlyCount "54"]
[EventDate "1966.10.23"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Romania"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "ROU"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 Nxd5 5. Nf3 c5 6. e3 Nc6 7. Bd3 Be7 8. O-O
O-O 9. a3 cxd4 10. exd4 Nxc3 11. bxc3 Bf6 12. Qe2 Qa5 13. Bc2 Qh5 14. Rb1 a6
15. a4 Nd8 16. c4 Bd7 17. a5 Bc6 18. Be4 Bxe4 19. Qxe4 Rc8 20. d5 exd5 21. cxd5
Rc5 22. d6 Qd5 23. Re1 Qxe4 24. Rxe4 Rd5 25. Rb6 h6 26. g4 Ne6 27. Bf4 Rb8
1/2-1/2

[Event "Havana ol (Men) qual-G"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Herdocia, Francisco"]
[Result "1-0"]
[ECO "D79"]
[WhiteElo "2370"]
[PlyCount "73"]
[EventDate "1966.10.23"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Nicaragua"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "NCA"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c6 6. d4 d5 7. cxd5 cxd5 8. Nc3
e6 9. Ne5 Qe7 10. b3 a6 11. a4 Rd8 12. Ba3 Qe8 13. f4 Nbd7 14. e3 Bf8 15. Bxf8
Qxf8 16. Rc1 Rb8 17. Rf2 Nb6 18. g4 Qb4 19. g5 Nh5 20. Ne2 Ng7 21. Ng3 Na8 22.
Bf1 Ne8 23. h4 Bd7 24. h5 Ng7 25. hxg6 hxg6 26. Rh2 Be8 27. Nd3 Qe7 28. Qg4 f6
29. Qh4 Kf7 30. Qh7 Qf8 31. gxf6 Kxf6 32. Qh4+ g5 33. Qxg5+ Kf7 34. Ne5+ Kg8
35. Qh4 Bh5 36. Nxh5 Nxh5 37. Qxh5 1-0

[Event "Havana ol (Men) fin-B"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "1"]
[White "Westman, Jan Erik"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C87"]
[BlackElo "2370"]
[PlyCount "56"]
[EventDate "1966.10.25"]
[EventType "team"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Sweden"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "SWE"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 Nf6 7. O-O Be7 8. Re1
O-O 9. Nbd2 exd4 10. cxd4 Nb4 11. Bxd7 Qxd7 12. Nf1 c5 13. a3 Nc6 14. d5 Ne5
15. Nxe5 dxe5 16. Ng3 g6 17. f4 Bd6 18. f5 Kg7 19. Rf1 h6 20. Be3 Rh8 21. Rc1
Rac8 22. Qf3 Qe7 23. h4 Rcf8 24. Rc2 b5 25. Rcf2 c4 26. fxg6 fxg6 27. h5 Nd7
28. Qg4 g5 1-0

[Event "Havana ol (Men) fin-B"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Liem, Hong Gie"]
[Result "1/2-1/2"]
[ECO "D55"]
[WhiteElo "2370"]
[PlyCount "81"]
[EventDate "1966.10.25"]
[EventType "team"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Indonesia"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "INA"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bxf6 Bxf6 8. Rc1
c6 9. Bd3 Nd7 10. O-O dxc4 11. Bxc4 e5 12. Ne4 exd4 13. Nxf6+ Qxf6 14. Qxd4
Qxd4 15. Nxd4 Nb6 16. Bb3 Bd7 17. Rc5 Rfe8 18. h3 Rad8 19. a4 Nc8 20. Rc3 Nd6
21. Bc2 Ne4 22. Bxe4 Rxe4 23. a5 a6 24. f3 Re5 25. b4 f5 26. f4 Re4 27. Kf2 Kf7
28. Rd1 Be6 29. Rc5 Kf6 30. h4 Bd5 31. b5 axb5 32. Nxb5 Rb4 33. Nc3 Rb2+ 34.
Kg1 Rxg2+ 35. Kf1 Rh2 36. Nxd5+ cxd5 37. Rdxd5 Rxd5 38. Rxd5 Rb2 39. a6 Ke6 40.
Re5+ Kf6 41. Rd5 1/2-1/2

[Event "Havana ol (Men) fin-B"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Blau, Max"]
[Result "1/2-1/2"]
[ECO "D25"]
[WhiteElo "2370"]
[PlyCount "44"]
[EventDate "1966.10.25"]
[EventType "team"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Switzerland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "SUI"]

1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 Be6 5. Nc3 c6 6. Ng5 Qc8 7. Nxe6 Qxe6 8.
Be2 g6 9. O-O Bg7 10. Re1 O-O 11. e4 Nxe4 12. Nxe4 Qxe4 13. Bxc4 Qh4 14. g3 Qf6
15. Bf4 e6 16. Be5 Qe7 17. Bxg7 Kxg7 18. Qb3 b5 19. Bf1 a5 20. d5 cxd5 21. Qxd5
exd5 22. Rxe7 Nc6 1/2-1/2

[Event "Havana ol (Men) fin-B"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Westerinen, Heikki MJ"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "2370"]
[BlackElo "2450"]
[PlyCount "94"]
[EventDate "1966.10.25"]
[EventType "team"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Finland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "FIN"]

1. d4 d5 2. Nf3 Nf6 3. g3 Bf5 4. Bg2 e6 5. O-O c6 6. Nbd2 h6 7. c4 Be7 8. b3
O-O 9. Bb2 a5 10. Ne5 a4 11. c5 Qa5 12. Qc1 Na6 13. Bc3 Qb5 14. bxa4 Qxa4 15.
Qb2 Ra7 16. e3 Nc7 17. Bf3 Rfa8 18. a3 Bd8 19. Be2 Qc2 20. Qxc2 Bxc2 21. Rfc1
Ba4 22. Bb4 Bb5 23. Bxb5 Nxb5 24. Rcb1 Ba5 25. Nb3 Bc7 26. Nd3 Nxa3 27. Rxa3
Rxa3 28. Bxa3 Rxa3 29. Nbc1 Ra7 30. Nb3 Kf8 31. Ra1 Rxa1+ 32. Nxa1 Ke7 33. Nb3
Kd7 34. h4 Kc8 35. Kf1 Kb8 36. Ke2 Ka7 37. Kf1 Ka6 38. Kg2 Kb5 39. Nd2 Nd7 40.
f4 f6 41. g4 Ba5 42. Nf3 Kc4 43. Nf2 e5 44. fxe5 fxe5 45. g5 exd4 46. exd4 hxg5
47. Nxg5 Bc3 0-1

[Event "Havana ol (Men) fin-B"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "8"]
[White "Zinser, Sylvain"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E74"]
[Annotator "Bulletin"]
[PlyCount "87"]
[EventDate "1966.10.25"]
[EventType "team"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1998.11.10"]
[WhiteTeam "France"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "COL"]

{Inf.2/673} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be2 d6 6. Bg5 c5 7. d5
Qa5 8. Bd2 Qc7 9. Nf3 e6 10. O-O exd5 11. cxd5 a6 12. a4 Re8 13. Qc2 Bg4 14. h3
Bxf3 15. Bxf3 Nbd7 16. Bf4 (16. b3 c4 17. b4 Re7 18. Rfe1 Rae8 19. Rac1 h6 $14)
16... Re7 $11 17. g4 h6 18. Bg3 c4 19. Rfd1 Ne5 20. Be2 g5 21. Bxe5 Rxe5 22.
Rd4 Rc8 23. Rxc4 Qd8 24. f3 Rxc4 25. Bxc4 Nd7 26. Nd1 Re8 27. Kg2 Bd4 28. Rc1
Qf6 29. Qd2 Rc8 30. Be2 Rxc1 31. Qxc1 Kg7 32. b4 Ne5 33. Nf2 Bxf2 34. Kxf2 Ng6
35. Qc4 Qa1 36. a5 Ne5 $44 37. Qb3 Qd4+ 38. Ke1 Ng6 39. Qc4 Qa1+ 40. Kf2 Ne5
41. Qb3 Ng6 42. b5 Qxa5 43. bxa6 bxa6 44. h4 1/2-1/2

[Event "Havana ol (Men) fin-B"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Hartston, William R"]
[Result "1/2-1/2"]
[ECO "D94"]
[WhiteElo "2370"]
[BlackElo "2420"]
[PlyCount "36"]
[EventDate "1966.10.25"]
[EventType "team"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "England"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ENG"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 g6 5. e3 Bg7 6. Bd3 O-O 7. O-O Bg4 8. h3
Bxf3 9. Qxf3 dxc4 10. Bxc4 Nbd7 11. Rd1 Nb6 12. Bb3 Nfd7 13. e4 e6 14. Be3 Qe7
15. Rac1 Rac8 16. Na4 Nxa4 17. Bxa4 Nb6 18. Bb3 Rfd8 1/2-1/2

[Event "Havana ol (Men) fin-B"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Mc Alpine, Kenneth"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "2370"]
[PlyCount "82"]
[EventDate "1966.10.25"]
[EventType "team"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "SCO"]

1. d4 e6 2. e4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 cxd4 7. cxd4 Bd7 8. O-O
Nxd4 9. Nxd4 Qxd4 10. Nc3 a6 11. Qe2 Ne7 12. Kh1 Nc6 13. f4 Nb4 14. Bb1 Qc4 15.
Rd1 Qxe2 16. Nxe2 Bc5 17. Bd2 Nc6 18. Bd3 O-O 19. Rac1 Ba7 20. g3 Rac8 21. Kg2
Nd4 22. Rxc8 Rxc8 23. Be3 Nc6 24. Bxa7 Nxa7 25. Kf2 Ba4 26. Rd2 Bb5 27. Nd4
Bxd3 28. Rxd3 Nc6 29. Rc3 Kf8 30. Nb3 Ke7 31. a3 b6 32. Nd4 Kd7 33. Ne2 Na5 34.
Rxc8 Kxc8 35. b4 Nc4 36. a4 Nb2 37. b5 Nxa4 38. bxa6 Nc5 39. a7 Kb7 40. Nd4
Kxa7 41. Ke3 Ka6 0-1

[Event "Havana ol (Men) fin-B"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Prins, Lodewijk"]
[Result "0-1"]
[ECO "D13"]
[WhiteElo "2370"]
[PlyCount "108"]
[EventDate "1966.10.25"]
[EventType "team"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Columbia"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "NED"]

1. Nf3 Nf6 2. c4 c6 3. d4 d5 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Ne4 7. e3 Qa5 8.
Qb3 e6 9. Bd3 Nxc3 10. bxc3 Qa3 11. O-O Na5 12. Bb5+ Kd8 13. Qc2 a6 14. Be2 Bd6
15. Bxd6 Qxd6 16. e4 Bd7 17. exd5 exd5 18. Ne5 Be6 19. a4 Rc8 20. Qb2 Rc7 21.
Rac1 Ke7 22. Rfe1 Rhc8 23. Bg4 Kf8 24. Bxe6 fxe6 25. Re3 Nc6 26. Nxc6 Qxc6 27.
Qb4+ Kg8 28. Rce1 Rf8 29. f3 Rf6 30. Rb1 h6 31. a5 Rff7 32. Rbe1 Rf6 33. Rb1
Qd7 34. Qa3 Rc6 35. Rb4 Qc7 36. Qb2 Rf7 37. Rb6 Rxb6 38. axb6 Qd6 39. g3 Rf8
40. f4 Rc8 41. Re1 Rc6 42. Rb1 Qd8 43. Kg2 Qc8 44. Rc1 Rc4 45. Qc2 a5 46. Qg6
Rc6 47. Re1 Qd7 48. Re5 Qf7 49. Qxf7+ Kxf7 50. f5 a4 51. fxe6+ Rxe6 52. Rxd5
Rxb6 53. Kf3 a3 54. Ra5 Ra6 0-1

[Event "Havana ol (Men) fin-B"]
[Site "Havana"]
[Date "1966.??.??"]
[Round "13"]
[White "Witt, Leslie"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A65"]
[BlackElo "2370"]
[PlyCount "94"]
[EventDate "1966.10.25"]
[EventType "team"]
[EventRounds "13"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[WhiteTeam "Canada"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "CAN"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. f3 c5 6. d5 d6 7. Be3 e6 8. Qd2 exd5
9. cxd5 a6 10. Bd3 Re8 11. Nge2 b5 12. O-O Nbd7 13. Rac1 Ne5 14. b3 Nxd3 15.
Qxd3 b4 16. Na4 Bd7 17. Nb2 Nxe4 18. Nc4 Nc3 19. Nxc3 bxc3 20. Bf2 Bb5 21. Rce1
Qg5 22. Re4 Qd2 23. Qxd2 cxd2 24. Nxd2 Bxf1 25. Kxf1 Rxe4 26. Nxe4 Be5 27. g3
f5 28. Nd2 Bf6 29. Nc4 Rd8 30. Ke2 Kf7 31. Kd3 Be7 32. Be1 h5 33. h3 Bf6 34.
Ba5 Rd7 35. b4 cxb4 36. Bxb4 Be7 37. Na5 Rd8 38. Nc6 Rc8 39. Bc3 Ke8 40. Nb4
Ra8 41. Kc4 Kd7 42. Nd3 Rc8+ 43. Kb3 h4 44. gxh4 Bxh4 45. Nb4 Re8 46. Bd4 Be1
47. Nd3 Bd2 0-1

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "1"]
[White "Minaya Molano, Juan M"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E93"]
[PlyCount "27"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 8. Bg5
h6 9. Bh4 a6 10. Nd2 Qe8 11. g4 Nh7 12. Qc2 Bf6 13. Bxf6 Ndxf6 14. Rg1 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "D55"]
[PlyCount "99"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 O-O 6. e3 h6 7. Bxf6 Bxf6 8. Qd2
Nc6 9. Rd1 b6 10. Be2 Bb7 11. cxd5 exd5 12. O-O Re8 13. Ne1 Ne7 14. b4 c6 15.
a4 a6 16. Nc2 b5 17. Bd3 Bc8 18. Ra1 Bf5 19. Ra2 Rc8 20. axb5 axb5 21. Rfa1 Qd7
22. Ra7 Rc7 23. Rxc7 Qxc7 24. Ne2 Qb7 25. Nc1 Ra8 26. Ra5 Re8 27. Nb3 Qc8 28.
Ra3 Bxd3 29. Qxd3 Nf5 30. Na5 Nd6 31. Qc3 Nc4 32. Nxc4 bxc4 33. Qa1 Qf5 34. Rc3
Be7 35. Qa4 Rb8 36. f3 Qc8 37. Ra3 Bd6 38. Ra2 Qc7 39. f4 Qc8 40. Kf2 g5 41. g3
g4 42. e4 Qe8 43. e5 Bf8 44. Ne3 Rxb4 45. Qd1 Qb8 46. Qxg4+ Kh8 47. Qf5 c3 48.
Ng4 Rb2+ 49. Kf3 Qb3 50. Qf6+ 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "3"]
[White "Sanchez, Luis Augusto"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "E63"]
[PlyCount "83"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d6 6. d4 Nc6 7. Nc3 a6 8. h3
Rb8 9. a4 a5 10. e4 e5 11. Be3 exd4 12. Nxd4 Re8 13. Rc1 Nd7 14. Re1 Nce5 15.
Bf1 Nc5 16. Ndb5 Be6 17. b3 g5 18. Nd4 Qf6 19. Kg2 g4 20. Nxe6 Qf3+ 21. Qxf3
gxf3+ 22. Kg1 fxe6 23. Rb1 c6 24. Red1 Ned7 25. Bd4 Be5 26. h4 h5 27. Bh3 Kf7
28. b4 axb4 29. Rxb4 Ke7 30. a5 Ra8 31. Bxc5 Nxc5 32. Na4 Reb8 33. Nxc5 dxc5
34. Rb3 Rxa5 35. Rxf3 b5 36. Bf1 b4 37. Rfd3 Bd4 38. R3d2 b3 39. Bd3 Ra2 40.
Bb1 Rxd2 41. Rxd2 Ra8 42. Bd3 0-1

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "4"]
[White "Rodriguez, Jose ES"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B23"]
[PlyCount "32"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 c5 2. Nc3 g6 3. f4 Bg7 4. Nf3 Nc6 5. Bb5 d6 6. Bxc6+ bxc6 7. d3 Nf6 8.
O-O O-O 9. Qe1 Rb8 10. b3 Ne8 11. Rb1 Nc7 12. Ne2 Bg4 13. Bb2 Bxb2 14. Rxb2 Nb5
15. Qh4 Bxf3 16. Rxf3 e6 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Cuartas, Carlos Enrique"]
[Result "1-0"]
[ECO "C00"]
[PlyCount "70"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 4. O-O c5 5. d3 Be7 6. Nbd2 Nc6 7. e4 O-O 8. Re1
Qc7 9. Qe2 d4 10. a4 e5 11. Nh4 g6 12. Nc4 Ne8 13. Bh6 Ng7 14. f4 Bxh4 15. gxh4
Qe7 16. Qf2 f6 17. f5 Nd8 18. Kh1 Nf7 19. Bxg7 Kxg7 20. Rg1 Bd7 21. Bh3 Rg8 22.
fxg6 hxg6 23. Bxd7 Qxd7 24. Rg3 Nd6 25. Rag1 Qe6 26. Nxd6 Qxd6 27. Rxg6+ Kf7
28. Qg3 Rxg6 29. Qxg6+ Ke6 30. Qf5+ Kf7 31. Qh7+ Ke6 32. Rg7 Qd8 33. Qf5+ Kd6
34. Rf7 b6 35. Rxf6+ Kc7 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Minaya Molano, Juan M"]
[Result "1-0"]
[ECO "D42"]
[PlyCount "71"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. e3 d5 5. cxd5 Nxd5 6. d4 cxd4 7. exd4 e6 8.
Bd3 Be7 9. O-O O-O 10. Re1 Bf6 11. Be4 Nxc3 12. bxc3 Qa5 13. Qd3 g6 14. Bh6 Rd8
15. Qe3 Bd7 16. Qf4 Bh8 17. Bxc6 Bxc6 18. Ne5 Be8 19. Re3 f6 20. Rae1 Rac8 21.
Ng4 Qf5 22. Rxe6 Bf7 23. Qxf5 gxf5 24. Nxf6+ Bxf6 25. Rxf6 Rxc3 26. Re7 Bxa2
27. Rxb7 Rb3 28. Rxb3 Bxb3 29. Rxf5 Bc2 30. Rg5+ Bg6 31. h4 Rxd4 32. h5 Rh4 33.
g4 Kf7 34. f3 a6 35. Kg2 Bd3 36. Re5 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "7"]
[White "Cuellar Gacharna, Miguel"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E81"]
[PlyCount "83"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. f3 c5 6. d5 d6 7. Bg5 h6 8. Be3 e6
9. dxe6 Bxe6 10. Qd2 Kh7 11. Rd1 Qb6 12. b3 Nc6 13. Bd3 Nd7 14. Nge2 a6 15. O-O
Qa5 16. f4 Bg4 17. Rc1 Bxe2 18. Bxe2 Nd4 19. Bd3 f5 20. exf5 gxf5 21. Kh1 Kh8
22. Qd1 Nf6 23. Bb1 Ng4 24. Bg1 Rae8 25. Re1 Rxe1 26. Qxe1 Qd8 27. h3 h5 28.
hxg4 hxg4 29. Nd5 Re8 30. Be3 Re6 31. Bd3 Rh6+ 32. Kg1 Qe8 33. Kf1 Rh1+ 34. Bg1
Qh5 35. Qg3 Ne6 36. Ke2 Bd4 37. Bxd4+ Nxd4+ 38. Kd2 Rh2 39. Kc3 b5 40. b4 Rh1
41. Re1 Kg7 42. Qe3 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Sanchez, Luis Augusto"]
[Result "1-0"]
[ECO "D30"]
[PlyCount "59"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 d5 5. e3 c5 6. dxc5 Bxc5 7. Be2 O-O 8.
O-O Nc6 9. a3 dxc4 10. Nxc4 Qxd1 11. Rxd1 Rd8 12. Rxd8+ Nxd8 13. b4 Be7 14.
Nfe5 Nd7 15. Bb2 Nxe5 16. Nxe5 f6 17. Nc4 e5 18. Rd1 Be6 19. e4 Nf7 20. Ne3 Rc8
21. Kf1 Nd6 22. f3 Nc4 23. Nxc4 Bxc4 24. Bxc4+ Rxc4 25. Rd3 h6 26. Bc3 Kh7 27.
Bd2 Rc6 28. Rd7 Rd6 29. Rxe7 Rxd2 30. Rxb7 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Rodriguez, Jose ES"]
[Result "1-0"]
[ECO "A81"]
[PlyCount "143"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 f5 2. Nf3 Nf6 3. g3 c6 4. Bg2 d6 5. O-O Qc7 6. c4 e5 7. Nc3 e4 8. Ne1 Qf7
9. d5 cxd5 10. cxd5 g6 11. f3 e3 12. Bxe3 Bg7 13. f4 O-O 14. Bd4 Re8 15. Nc2
Bd7 16. Qd2 Na6 17. Rae1 Nc7 18. e4 fxe4 19. Nxe4 Nxe4 20. Rxe4 Rxe4 21. Bxe4
Re8 22. Bf3 Nb5 23. Bxg7 Qxg7 24. a4 Nc7 25. Qd4 Qxd4+ 26. Nxd4 Bxa4 27. Ra1
Bd7 28. Rxa7 Bc8 29. Kf2 Re7 30. Ra3 Bd7 31. Rc3 Nb5 32. Nxb5 Bxb5 33. Rc8+ Kf7
34. Bg4 Bd7 35. Bxd7 Rxd7 36. Ke3 Kf6 37. Kd4 Kf5 38. h3 Kf6 39. Rf8+ Ke7 40.
Rh8 Kf6 41. Rc8 g5 42. fxg5+ Kxg5 43. b4 Kf6 44. Rf8+ Kg7 45. Re8 Kf7 46. Rb8
Kf6 47. b5 Rg7 48. g4 h5 49. gxh5 Rh7 50. Re8 Rxh5 51. Re6+ Kf7 52. Rxd6 Ke7
53. Rb6 Rxh3 54. Rxb7+ Kd6 55. Rb6+ Kd7 56. Rc6 Rh1 57. Kc5 Rd1 58. Rd6+ Kc7
59. b6+ Kb7 60. Rd7+ Kc8 61. Rc7+ Kb8 62. d6 Rc1+ 63. Kd5 Rd1+ 64. Ke5 Re1+ 65.
Kf4 Rf1+ 66. Ke3 Re1+ 67. Kd2 Rh1 68. d7 Rh8 69. Kc3 Rg8 70. Kb4 Rd8 71. Kb5
Ka8 72. Ka6 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "10"]
[White "Cuartas, Carlos Enrique"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "E66"]
[PlyCount "98"]
[EventDate "1969.??.??"]
[EventType "tourn"]
[EventRounds "10"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 d6 6. Nf3 Nc6 7. d5 Na5 8. Nd2
c5 9. O-O a6 10. Qc2 Rb8 11. b3 b5 12. Bb2 bxc4 13. bxc4 e6 14. Rab1 Bb7 15.
Rfd1 exd5 16. cxd5 Re8 17. h3 Bc8 18. Ba1 Bd7 19. Rxb8 Qxb8 20. Rb1 Qd8 21. e3
Bf5 22. e4 Bc8 23. Kh2 Nd7 24. Nd1 Bxa1 25. Rxa1 Qf6 26. Qc3 Qxc3 27. Nxc3 Ne5
28. g4 g5 29. Kg3 Nac4 30. Nxc4 Nxc4 31. Re1 f5 32. gxf5 Bxf5 33. f3 Bc8 34.
Nd1 Re7 35. Nf2 Rb7 36. Ng4 Bxg4 37. fxg4 Rb2 38. Ra1 a5 39. Bf3 a4 40. h4 h6
41. hxg5 hxg5 42. a3 Rb3 43. Kg2 Rxa3 44. Rxa3 Nxa3 45. Bd1 Nc4 46. Bxa4 Kg7
47. Kf2 Kf6 48. Ke2 Ke5 49. Bc2 Kf4 0-1

[Event "Bogota m play off"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "1"]
[White "Cuellar Gacharna, Miguel"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E91"]
[PlyCount "94"]
[EventDate "1969.??.??"]
[EventType "match"]
[EventRounds "2"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be2 d6 6. Nf3 e5 7. O-O Bg4 8. Be3
Nfd7 9. d5 Bxf3 10. Bxf3 a5 11. a3 Na6 12. Rb1 f5 13. b4 axb4 14. axb4 Nf6 15.
Bg5 Qd7 16. Qd2 Rf7 17. Ra1 Raf8 18. Bxf6 Bxf6 19. Na4 fxe4 20. Bxe4 Qg4 21.
Rae1 Bg5 22. Qb2 Nb8 23. Nc3 Nd7 24. f3 Qf4 25. Re2 Ra8 26. Nb5 Bd8 27. Qc2 Nf6
28. c5 Nxe4 29. Rxe4 Qf6 30. c6 b6 31. Rfe1 Qg5 32. Qe2 Rf4 33. Nc3 Qh6 34.
Rxf4 Qxf4 35. Ne4 Qf7 36. Qc4 Be7 37. Nc3 Kg7 38. h4 h5 39. Re4 Kh7 40. Kh2 Bd8
41. Qe2 Ra3 42. Rc4 Ra8 43. Qd2 Qf6 44. Qe1 Qf7 45. Qd2 Qf6 46. Kg3 Kg7 47. Kh2
Ra1 1/2-1/2

[Event "Bogota m play off"]
[Site "Bogota"]
[Date "1969.??.??"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "D58"]
[PlyCount "118"]
[EventDate "1969.??.??"]
[EventType "match"]
[EventRounds "2"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. Qc2
Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. O-O-O Nc6 12. a3 Na5 13. h4 c5 14. g4 cxd4
15. Nxd4 Rc8 16. g5 Bxd4 17. Rxd4 Qd6 18. Kb1 Nc4 19. Bxc4 Rxc4 20. Rhd1 Rfc8
21. Ka2 Rxd4 22. Rxd4 Rc4 23. Qd3 Rxd4 24. Qxd4 hxg5 25. hxg5 Qc6 26. f4 Qe6
27. a4 Bc6 28. b3 Qf5 29. Kb2 Qd7 30. Ka3 Qe7+ 31. b4 Qe6 32. b5 Bb7 33. Kb3 f6
34. gxf6 gxf6 35. Kb2 Kf7 36. a5 Kg6 37. axb6 axb6 38. Na4 Qg4 39. Qd3+ f5 40.
Nxb6 d4 41. Nc4 Qg2+ 42. Ka3 dxe3 43. Nxe3 Qh3 44. Qd6+ Kf7 45. Qc7+ Kg6 46.
Qb6+ Kh5 47. Qe6 Be4 48. Qe8+ Kh4 49. Qh8+ Kg3 50. Qxh3+ Kxh3 51. Nxf5 Kg4 52.
Nd6 Bh1 53. f5 Kg5 54. Kb4 Kf6 55. Kc5 Ke5 56. b6 Ba8 57. Nc4+ Kxf5 58. Kd6 Ke4
59. Kc7 Kd4 1/2-1/2

[Event "Bogota El Tiempo"]
[Site "Bogota"]
[Date "1970.01.30"]
[Round "1"]
[White "Yepez, Trotzky"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "C60"]
[PlyCount "52"]
[EventDate "1970.01.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. d4 exd4 5. c3 a6 6. Be2 dxc3 7. Nxc3 d6 8.
Ng5 h6 9. Nxf7 Kxf7 10. Bc4+ Kg6 11. f4 Kh7 12. g4 g5 13. f5 Ne5 14. Be2 b5 15.
h4 gxh4 16. Bf4 Bg7 17. Qd2 b4 18. Nd5 Nxd5 19. Qxd5 c6 20. Qb3 Rf8 21. O-O-O
Qf6 22. Rh2 Be6 23. Qxe6 Qxe6 24. fxe6 Rxf4 25. Rxd6 Bf6 26. Kc2 Rd8 0-1

[Event "Bogota El Tiempo"]
[Site "Bogota"]
[Date "1970.01.??"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1/2-1/2"]
[ECO "A16"]
[PlyCount "55"]
[EventDate "1970.01.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. c4 Nf6 2. g3 d5 3. cxd5 Nxd5 4. Bg2 g6 5. Nc3 Nxc3 6. bxc3 Bg7 7. Rb1 c6 8.
Nf3 O-O 9. d4 Qa5 10. Qc2 Nd7 11. O-O Nb6 12. c4 Rd8 13. Bd2 Qa6 14. Rb4 Be6
15. Rc1 Rac8 16. c5 Nd5 17. Ra4 Qxe2 18. Rxa7 Rb8 19. Re1 Bf5 20. Rxe2 Bxc2 21.
Ba5 Bd1 22. Rd2 b6 23. Bxb6 Nxb6 24. cxb6 Bxf3 25. Bxf3 Bxd4 26. Rxe7 Bxb6 27.
Rxd8+ Rxd8 28. Bxc6 1/2-1/2

[Event "Bogota El Tiempo"]
[Site "Bogota"]
[Date "1970.01.??"]
[Round "3"]
[White "Cuartas, Carlos Enrique"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C98"]
[PlyCount "82"]
[EventDate "1970.01.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. d5 Nd8 14. Nf1 Ne8 15. g4
g6 16. Ng3 Ng7 17. Kh2 f6 18. Rg1 Nf7 19. Rg2 Kh8 20. Ng1 Bd7 21. Be3 c4 22. f3
Rfb8 23. Qd2 a5 24. a3 Qd8 25. Rf2 g5 26. N1e2 Qe8 27. Nf5 Bxf5 28. exf5 h5 29.
Ng3 h4 30. Ne4 Qd8 31. Rff1 Ne8 32. Rfb1 a4 33. Rf1 Nc7 34. Rad1 Na6 35. Bb1
Qf8 36. Qc2 Qh6 37. Qd2 Rf8 38. Qf2 Rac8 39. Rd2 Nb8 40. Rfd1 Nd7 41. Kg2 Bd8
1/2-1/2

[Event "Bogota El Tiempo"]
[Site "Bogota"]
[Date "1970.01.??"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Cuellar Gacharna, Miguel"]
[Result "0-1"]
[ECO "B61"]
[PlyCount "84"]
[EventDate "1970.01.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 Bd7 7. Qd2 a6 8. f4
b5 9. Bxf6 gxf6 10. Be2 h5 11. O-O-O e6 12. Nxc6 Bxc6 13. Bf3 Qb6 14. Ne2 Rc8
15. Kb1 b4 16. Nd4 Ba4 17. Rc1 Bg7 18. Nb3 Ke7 19. c3 a5 20. cxb4 axb4 21. Rxc8
Rxc8 22. f5 Rc4 23. Rc1 Rxc1+ 24. Nxc1 Bc6 25. Ne2 Qc5 26. Nd4 Bb7 27. Nb3 Qb6
28. h4 Ba8 29. Nc1 Kf8 30. Ne2 Qc5 31. Ng3 Bc6 32. Nxh5 exf5 33. Nxg7 Kxg7 34.
Qf4 Bb5 35. Qd2 f4 36. b3 Qe3 37. Kc2 Qc5+ 38. Kd1 Qg1+ 39. Kc2 Qa1 40. Qxf4
Qxa2+ 41. Kd1 Qxb3+ 42. Ke1 Qc3+ 0-1

[Event "Bogota El Tiempo"]
[Site "Bogota"]
[Date "1970.01.??"]
[Round "5"]
[White "Sanchez, Luis Augusto"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C68"]
[PlyCount "50"]
[EventDate "1970.01.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 Bd7
8. Be3 O-O-O 9. Nd2 c5 10. N4b3 b6 11. O-O Ne7 12. Rfd1 Nc6 13. Nf3 Be7 14. h3
Bf6 15. c3 h6 16. Nbd2 Be6 17. Re1 g5 18. Nf1 Ne5 19. Nxe5 Bxe5 20. Nd2 a5 21.
a3 f6 22. Nf3 a4 23. Nxe5 fxe5 24. Rad1 Bb3 25. Rxd8+ Kxd8 1/2-1/2

[Event "Bogota El Tiempo"]
[Site "Bogota"]
[Date "1970.01.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Gutierrez, Joaquin"]
[Result "1/2-1/2"]
[ECO "A04"]
[PlyCount "69"]
[EventDate "1970.01.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e6 2. d3 c5 3. Nf3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. Re1 d6 8. c3
O-O 9. a4 Rb8 10. Nbd2 a6 11. Nf1 b5 12. axb5 axb5 13. d4 b4 14. Bf4 c4 15.
N1d2 e5 16. dxe5 dxe5 17. Be3 bxc3 18. bxc3 Na5 19. Qa4 Nb3 20. Rab1 Be6 21.
Nxc4 Qc7 22. Rxb3 Rxb3 23. Qxb3 Bxc4 24. Qb6 Qd7 25. Qa7 Qxa7 26. Bxa7 Rc8 27.
Bh3 Rc6 28. Rd1 f6 29. Nd2 Bd3 30. Be3 Rxc3 31. Be6+ Kf8 32. Nb1 Rc6 33. Rxd3
Rxe6 34. Rd8+ Kf7 35. Nc3 1/2-1/2

[Event "Bogota El Tiempo"]
[Site "Bogota"]
[Date "1970.01.??"]
[Round "7"]
[White "Minaya Molano, Juan M"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C41"]
[PlyCount "83"]
[EventDate "1970.01.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 g6 5. Bc4 Bg7 6. Nc3 Nc6 7. Nxc6 bxc6 8.
O-O Nf6 9. e5 Ng4 10. e6 f5 11. h3 Ne5 12. Bb3 Ba6 13. Re1 Qe7 14. f4 Nc4 15.
Ba4 O-O 16. Bxc6 Bxc3 17. bxc3 Rab8 18. Be3 Nxe3 19. Rxe3 Bb7 20. Bxb7 Rxb7 21.
Qd4 Rfb8 22. Rae1 c5 23. Qd5 Rb1 24. Rxb1 Rxb1+ 25. Kh2 Rb8 26. Rd3 Re8 27.
Qxd6 Qxe6 28. Qxc5 Qe4 29. Rd4 Qb7 30. c4 Kg7 31. Qb5 Re7 32. Rd5 Qc7 33. Re5
Rd7 34. c5 Kh6 35. Qe2 Qc6 36. Qe1 Qc7 37. Qg3 Rf7 38. h4 Kg7 39. h5 Re7 40.
Rxf5 Re2 41. hxg6 hxg6 42. Qc3+ 1-0

[Event "Bogota El Tiempo"]
[Site "Bogota"]
[Date "1970.01.??"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Alzate, Dario"]
[Result "0-1"]
[ECO "D05"]
[PlyCount "90"]
[EventDate "1970.01.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 d5 2. Nf3 e6 3. e3 Nf6 4. Bd3 c5 5. c3 Nc6 6. Nbd2 Bd6 7. O-O e5 8. dxc5
Bxc5 9. e4 Bg4 10. exd5 Qxd5 11. Qe2 O-O 12. Ne4 Be7 13. Bg5 Rad8 14. Rad1 Qxa2
15. Bxf6 Bxf6 16. Nxf6+ gxf6 17. Qe3 Bh5 18. Ra1 Qe6 19. Be4 a6 20. Nh4 Bg6 21.
Rfe1 Rd7 22. h3 Ne7 23. f4 f5 24. Bc2 e4 25. Rad1 Rfd8 26. Rxd7 Rxd7 27. g4
fxg4 28. Bxe4 Bxe4 29. Qxe4 Qf6 30. Ng2 gxh3 31. Ne3 Rd2 32. Kh1 Qc6 33. Qxc6
Nxc6 34. Nf5 Kf8 35. Re3 Rxb2 36. Rxh3 Ne7 37. Nd4 Rf2 38. Rxh7 Rxf4 39. Rh8+
Kg7 40. Re8 Nd5 41. Ne2 Rc4 42. Rb8 b5 43. Ra8 Nxc3 44. Nxc3 Rxc3 45. Rxa6 Rc2
0-1

[Event "Bogota El Tiempo"]
[Site "Bogota"]
[Date "1970.02.10"]
[Round "9"]
[White "Mecking, Henrique"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C60"]
[PlyCount "83"]
[EventDate "1970.01.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8.
exd5 Nxd5 9. Re1+ Be6 10. Bg5 Qd6 11. Nc3 O-O 12. Qd2 a6 13. Ne4 Qb4 14. Bxc6
Qxd2 15. Bxd2 bxc6 16. Rac1 Rfb8 17. b3 a5 18. Nc5 Bf5 19. h3 h5 20. Ne5 Bxe5
21. dxe5 Nb4 22. Bxb4 axb4 23. Na4 Ra6 24. Red1 g5 25. Rd4 Rb5 26. g4 hxg4 27.
hxg4 Be6 28. Nc5 Rxc5 29. Rxc5 Rxa2 30. Rxb4 Ra1+ 31. Kg2 Bd5+ 32. f3 Re1 33.
Kf2 Rxe5 34. Re4 f6 35. Rxe5 fxe5 36. Ra5 Kf7 37. Ra7 Bxb3 38. Rxc7+ Kf6 39.
Rxc6+ Be6 40. Ke3 Ke7 41. Rxe6+ Kxe6 42. Ke4 1-0

[Event "Siegen ol (Men) fin-B"]
[Site "Siegen"]
[Date "1970.09.17"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Olsson, Ake"]
[Result "1-0"]
[ECO "E71"]
[WhiteElo "2370"]
[BlackElo "2380"]
[PlyCount "97"]
[EventDate "1970.09.05"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[WhiteTeam "Columbia"]
[BlackTeam "Sweden"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "SWE"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 Nbd7 6. Be3 e5 7. d5 Nc5 8. Qc2 a5
9. g4 O-O 10. Nge2 Kh8 11. Ng3 Ng8 12. Qd2 h6 13. O-O-O Qh4 14. Be2 Bf6 15.
Rdg1 Bg5 16. Bxg5 Qxg5 17. Qxg5 hxg5 18. h4 gxh4 19. Rxh4+ Kg7 20. g5 f6 21.
Rgh1 fxg5 22. Rh7+ Kf6 23. Rxc7 Bd7 24. Rh7 Rf7 25. Rxf7+ Kxf7 26. Na4 Ke7 27.
Nxc5 dxc5 28. Rxb7 Rf8 29. Bg4 Nf6 30. Be6 Kd6 31. Kd2 Bxe6 32. Rb6+ Kc7 33.
Rxe6 Ng4 34. Rxg6 Rxf2+ 35. Ne2 Nh2 36. Rxg5 Nf3+ 37. Ke3 Nxg5 38. Kxf2 Nxe4+
39. Ke3 Nd6 40. Kd3 e4+ 41. Kc3 Ne8 42. Ng3 Nf6 43. Nf5 Ng4 44. b3 Ne5 45. a4
Nf3 46. Ng3 e3 47. Kd3 Nd4 48. Kxe3 Nxb3 49. Ne2 1-0

[Event "Siegen ol (Men) fin-B"]
[Site "Siegen"]
[Date "1970.09.18"]
[Round "5"]
[White "Gostowski, Rauli"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B35"]
[BlackElo "2370"]
[PlyCount "63"]
[EventDate "1970.09.05"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[WhiteTeam "Finland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FIN"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 d6 7. Bc4 Nf6 8. h3
O-O 9. Bb3 Qa5 10. O-O Nxd4 11. Bxd4 Be6 12. f4 Rfc8 13. Qf3 Qh5 14. Qd3 Nd7
15. Bxg7 Kxg7 16. Qd4+ Kg8 17. f5 Bxb3 18. axb3 Ne5 19. f6 Nc6 20. Qd2 e6 21.
Qxd6 Qe5 22. Qxe5 Nxe5 23. Rfd1 h5 24. Kf2 a6 25. Ke3 Rc7 26. Kf4 Nd7 27. Nb5
Rxc2 28. Rxd7 Rxb2 29. Nd6 Rf8 30. g4 Rxb3 31. gxh5 gxh5 32. Rg1+ 1-0

[Event "Siegen ol (Men) fin-B"]
[Site "Siegen"]
[Date "1970.09.24"]
[Round "10"]
[White "Bessaria, M."]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C53"]
[BlackElo "2370"]
[PlyCount "95"]
[EventDate "1970.09.05"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[WhiteTeam "Indonesia"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "INA"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Bb6 5. d4 Qe7 6. O-O d6 7. h3 Nf6 8. Re1
h6 9. Be3 g5 10. a4 a5 11. dxe5 dxe5 12. Bxb6 cxb6 13. Qb3 g4 14. hxg4 Bxg4 15.
Nbd2 Nd7 16. Nh2 h5 17. Ndf1 Rg8 18. Ne3 Bh3 19. Kh1 Nc5 20. Qc2 Be6 21. Nd5
Qg5 22. Rg1 Rd8 23. Rae1 Kf8 24. Qe2 Bg4 25. f3 Be6 26. Qc2 Rg6 27. Rd1 Kg7 28.
Nxb6 Bxc4 29. Nxc4 Rxd1 30. Qxd1 Ne6 31. Qd2 Qxd2 32. Nxd2 Nf4 33. Nc4 Nd3 34.
Nf1 Nc5 35. Nfe3 Nxa4 36. Nf5+ Kh7 37. Ra1 b5 38. Ncd6 Nxb2 39. Rb1 Na4 40.
Rxb5 Rg8 41. Nxf7 Rb8 42. Rd5 Nb6 43. Rd6 a4 44. Rxc6 a3 45. Ng5+ Kg8 46. Rc7
a2 47. Rg7+ Kf8 48. Ne6+ 1-0

[Event "Siegen ol (Men) fin-B"]
[Site "Siegen"]
[Date "1970.09.25"]
[Round "11"]
[White "Lhagva, Jambaldoo"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B79"]
[BlackElo "2370"]
[PlyCount "51"]
[EventDate "1970.09.05"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[WhiteTeam "Mongolia"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "MGL"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 d6 7. Bc4 Nf6 8. f3
O-O 9. Qd2 Bd7 10. O-O-O Ne5 11. Bb3 Qa5 12. h4 Rfc8 13. h5 Nc4 14. Bxc4 Rxc4
15. Nb3 Qa6 16. hxg6 fxg6 17. e5 Nh5 18. Nc5 dxc5 19. Qxd7 Rxc3 20. bxc3 Ng3
21. Qxe7 Ne2+ 22. Kb2 Qb6+ 23. Ka1 Qa5 24. Qe6+ Kf8 25. Qd6+ Kg8 26. Qd5+ 1-0

[Event "Siegen ol (Men) qual-F"]
[Site "Siegen"]
[Date "1970.09.09"]
[Round "5"]
[White "Janetschek, Karl"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A43"]
[BlackElo "2370"]
[PlyCount "40"]
[EventDate "1970.09.05"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[WhiteTeam "Austria"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "AUT"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. d5 d6 5. Be2 Nf6 6. Nc3 O-O 7. O-O a6 8. a4 Bg4
9. Nd2 Bxe2 10. Qxe2 Nbd7 11. Nc4 Ne8 12. a5 Nc7 13. Na4 Nb5 14. c3 Qc7 15. Be3
Rae8 16. Rac1 e6 17. Qd3 exd5 18. exd5 f5 19. f3 Ne5 20. Nxe5 Bxe5 1/2-1/2

[Event "Siegen ol (Men) qual-F"]
[Site "Siegen"]
[Date "1970.09.10"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Kerr, Brian"]
[Result "1-0"]
[ECO "E71"]
[WhiteElo "2370"]
[PlyCount "87"]
[EventDate "1970.09.05"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[WhiteTeam "Columbia"]
[BlackTeam "New Zealand"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "NZL"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. Be3 e5 7. d5 c5 8. g4 a6 9.
a4 Ne8 10. Nge2 f5 11. gxf5 gxf5 12. exf5 Bxf5 13. Ng3 Bc8 14. Bd3 Nd7 15. Nce4
Qa5+ 16. Bd2 Qc7 17. Nh5 Kh8 18. Rg1 Ndf6 19. Rxg7 Nxg7 20. Nhxf6 Bf5 21. Qe2
Rab8 22. Ra3 Bg6 23. Bh6 Rf7 24. Bxg7+ Kxg7 25. Nh5+ Kh8 26. Ng5 e4 27. Bxe4
Re7 28. Ne6 Qa5+ 29. Kf1 Bxe4 30. Qxe4 Qd2 31. Qe2 Qc1+ 32. Kg2 Rg8+ 33. Rg3
Rxg3+ 34. fxg3 Qh6 35. Qf2 b5 36. axb5 axb5 37. b3 bxc4 38. bxc4 Rb7 39. Qa2
Rb8 40. Qa1+ Kg8 41. Nf6+ Kf7 42. Ne4 Rb3 43. Nxd6+ Kg6 44. Nf4+ 1-0

[Event "Siegen ol (Men) qual-F"]
[Site "Siegen"]
[Date "1970.09.11"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Georgiades, Georgios"]
[Result "1-0"]
[ECO "D19"]
[WhiteElo "2370"]
[PlyCount "45"]
[EventDate "1970.09.05"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[WhiteTeam "Columbia"]
[BlackTeam "Cyprus"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "CYP"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O
Nbd7 9. Qe2 Bg6 10. Rd1 O-O 11. Bd3 Bxd3 12. Rxd3 Qe7 13. e4 h6 14. Bf4 Rac8
15. Rad1 a5 16. Ne5 Rfd8 17. Rg3 Kh7 18. Nxd7 Rxd7 19. e5 Nd5 20. Qg4 Rg8 21.
Bxh6 f5 22. Qg6+ Kh8 23. Bg5 1-0

[Event "Siegen ol (Men) qual-F"]
[Site "Siegen"]
[Date "1970.09.12"]
[Round "8"]
[White "Klundt, Klaus"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B77"]
[BlackElo "2370"]
[PlyCount "45"]
[EventDate "1970.09.05"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[WhiteTeam "Germany"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 d6 7. Bc4 Bd7 8.
Bb3 Nf6 9. f3 O-O 10. Qd2 Nxd4 11. Bxd4 b5 12. h4 h5 13. g4 e5 14. Be3 a5 15.
Bg5 a4 16. Bd5 Rc8 17. gxh5 gxh5 18. Bh6 Nxd5 19. Bxg7 Rxc3 20. Qh6 Re3+ 21.
Kf2 f6 22. exd5 Kf7 23. Bxf8 1-0

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.03.25"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Agudelo, Antonio"]
[Result "1-0"]
[ECO "E01"]
[PlyCount "93"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. g3 Nf6 2. Bg2 d5 3. Nf3 Nbd7 4. d4 e6 5. c4 b6 6. cxd5 exd5 7. Qa4 Bb7 8.
Nc3 c6 9. Bf4 Be7 10. O-O O-O 11. Rad1 Nh5 12. Bc1 f5 13. b4 b5 14. Qb3 a5 15.
a3 Kh8 16. e3 Bd6 17. Ne1 Nb6 18. Nd3 Nc4 19. Nc5 Qe7 20. Ne2 g5 21. f4 g4 22.
Rd3 Nf6 23. Rc3 h5 24. Nd3 axb4 25. axb4 Ra4 26. Ne5 Kg7 27. Qc2 Qe6 28. Rxc4
dxc4 29. d5 Nxd5 30. Nd4 Qc8 31. Bxd5 cxd5 32. Nxb5 Ra6 33. Bb2 Kh7 34. Nxd6
Rxd6 35. Bd4 Ra6 36. b5 Ra5 37. h3 gxh3 38. Qh2 Qe6 39. Rb1 Rg8 40. Qxh3 Kh6
41. Kf2 Ra2+ 42. Kf3 Rg4 43. Qxh5+ Kg7 44. Nxg4+ Kf8 45. Qh8+ Ke7 46. Bf6+ Kd6
47. Qb8+ 1-0

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.03.26"]
[Round "2"]
[White "Lopez, Fernando"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A40"]
[PlyCount "93"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. c4 Nc6 5. dxc5 Qa5+ 6. Bd2 Qxc5 7. Nc3 Nf6 8.
Be2 O-O 9. O-O Ne5 10. Rc1 d6 11. Nd5 Nxf3+ 12. Bxf3 Nxd5 13. cxd5 Qb6 14. b3
Bd7 15. Be3 Qa5 16. Qd2 Qxd2 17. Bxd2 Rfc8 18. Rxc8+ Rxc8 19. Rc1 Rxc1+ 20.
Bxc1 Bb5 21. Be3 b6 22. Bd1 Bd3 23. f3 f5 24. exf5 gxf5 25. Kf2 Kf7 26. Be2 Bb1
27. a4 e6 28. Bc4 e5 29. Ke2 e4 30. Kd2 exf3 31. gxf3 Be5 32. Kc1 f4 33. Bxb6
axb6 34. Kxb1 Bd4 35. Kc2 Bg1 36. Bd3 h5 37. h3 Kf6 38. Be4 Ke5 39. Kd3 Bf2 40.
Kc4 Be1 41. Bg6 h4 42. Be4 Bd2 43. b4 Be1 44. Kb5 Kd4 45. a5 bxa5 46. bxa5 Bf2
47. a6 1-0

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.03.27"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Cuartas, Carlos Enrique"]
[Result "0-1"]
[ECO "E61"]
[PlyCount "68"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 g6 2. Nc3 Bg7 3. d4 Nf6 4. Bg5 h6 5. Bh4 c5 6. d5 d6 7. e3 O-O 8. Bd3 a6
9. a4 e6 10. dxe6 Bxe6 11. Nge2 Nc6 12. O-O Ne5 13. b3 g5 14. Bg3 Nxd3 15. Qxd3
d5 16. Rad1 dxc4 17. Qb1 Qc8 18. bxc4 Bxc4 19. Rd2 Re8 20. Rfd1 b5 21. a5 b4
22. Na4 Ne4 23. Nb6 Nxd2 24. Rxd2 Qe6 25. Nxa8 Rxa8 26. Rd6 Qe8 27. Nc1 Rd8 28.
h4 gxh4 29. Bf4 Rxd6 30. Bxd6 Qc6 31. Bf4 h3 32. e4 Qg6 33. Bg3 Bd4 34. Kh2
Bxf2 0-1

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.03.29"]
[Round "4"]
[White "Rodriguez Gonzales, Jesus"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A26"]
[PlyCount "73"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. d3 e5 8. Bd2
Nh5 9. Rb1 a5 10. a3 f5 11. b4 axb4 12. axb4 f4 13. b5 Nd4 14. Nxd4 exd4 15.
Nd5 Be5 16. Qc1 g5 17. Bf3 g4 18. Be4 Bf5 19. Nxf4 Nxf4 20. Bxf4 Bxe4 21. Bg5
Qe8 22. dxe4 Ra2 23. c5 Qe6 24. cxd6 cxd6 25. Rb2 Rxb2 26. Qxb2 h6 27. Bc1 Ra8
28. Qd2 Ra2 29. Qd3 Kg7 30. f4 Bf6 31. f5 Qe5 32. Bf4 Qc5 33. Rc1 Qb6 34. Kh1
Ra8 35. Qc4 Re8 36. Bxh6+ Kxh6 37. Qf7 1-0

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.04.01"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Gutierrez Castillo, Jose Antonio"]
[Result "1/2-1/2"]
[ECO "E45"]
[PlyCount "30"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6 6. a3 Bxc3+ 7. Nxc3 d5 8. b3
O-O 9. Be2 Nc6 10. O-O Na5 11. c5 Bxe2 12. Nxe2 Nb7 13. b4 a5 14. Bd2 axb4 15.
axb4 Ne4 1/2-1/2

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.04.02"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Estevez Morales, Guillermo"]
[Result "1/2-1/2"]
[ECO "E63"]
[PlyCount "114"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 d6 5. O-O O-O 6. c4 Nc6 7. Nc3 a6 8. h3
Bd7 9. Be3 Rb8 10. a4 Nb4 11. Qd2 Re8 12. Rfd1 b5 13. axb5 axb5 14. cxb5 Bxb5
15. Nxb5 Rxb5 16. Ne1 Qd7 17. Rdc1 Reb8 18. Nd3 Nxd3 19. Qxd3 Rxb2 20. Ra7 Ne8
21. Qc4 R2b4 22. Qc6 Qc8 23. Rc4 R4b6 24. Qa4 d5 25. Bxd5 Qxh3 26. Rc1 Rb4 27.
Qd1 Rd8 28. Bg2 Qf5 29. d5 e6 30. Qe1 Rb3 31. dxe6 Qxe6 32. Bf4 Bd4 33. Ra8
Rxa8 34. Bxa8 g5 35. Qd1 Bxf2+ 36. Kxf2 gxf4 37. gxf4 Qe3+ 38. Kf1 Rb4 39. Bf3
Rxf4 40. Ra1 Kg7 41. Qd5 h6 42. Ra5 Nf6 43. Qe5 Qxe5 44. Rxe5 Rc4 45. Ke1 Kg6
46. Kd2 h5 47. Kd3 Rc1 48. Kd2 Ra1 49. Ke3 Ra3+ 50. Kf4 Ra6 51. Rg5+ Kh6 52.
Rc5 Ra7 53. Rf5 Kg7 54. Rg5+ Kf8 55. Rf5 Ke7 56. Re5+ Kd7 57. Rf5 Ra6 1/2-1/2

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.04.03"]
[Round "7"]
[White "De la Roche, Joaquin"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "B09"]
[PlyCount "85"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nc6 5. Be3 Nf6 6. Nf3 O-O 7. Qd2 e5 8. d5
exf4 9. Bxf4 Ne5 10. Nxe5 dxe5 11. Bg5 h6 12. Bh4 Nxe4 13. Bxd8 Nxd2 14. Bxc7
Nxf1 15. Rxf1 e4 16. O-O-O f5 17. Bd6 Rf7 18. Nb5 Bd7 19. Nc7 Rc8 20. Ne6 Bf6
21. Kb1 h5 22. Rfe1 Rh7 23. Nc5 b6 24. Nb3 Ba4 25. h3 Rd7 26. Bg3 Bxb3 27. axb3
b5 28. Bf2 Kf7 29. c3 a6 30. Kc2 Re8 31. c4 f4 32. Bd4 Bh4 33. Re2 g5 34. Rf1
Bg3 35. Kc3 Kg6 36. Bf2 Bxf2 37. Rfxf2 e3 38. Rf3 Kf5 39. Kd3 g4 40. hxg4+ hxg4
41. Rf1 Rde7 42. c5 Re5 43. Kd4 0-1

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.04.04"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Castrillon, Tirso"]
[Result "1-0"]
[ECO "E12"]
[PlyCount "109"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. c4 Bb7 5. a3 Bxf3 6. Qxf3 d5 7. Nc3 c6 8. Be2
Qd6 9. O-O Nbd7 10. Rd1 Be7 11. e4 dxe4 12. Nxe4 Nxe4 13. Qxe4 Qc7 14. Bf4 Bd6
15. Bxd6 Qxd6 16. Bf3 Rc8 17. c5 Qe7 18. cxb6 axb6 19. Rac1 Nb8 20. d5 exd5 21.
Rxd5 Qxe4 22. Bxe4 Ke7 23. Re5+ Kd6 24. Rf5 f6 25. Rf3 g6 26. Rd1+ Ke6 27. Bc2
f5 28. Re3+ Kf6 29. Rd6+ Kg7 30. Re7+ Kh6 31. Bxf5 Rcd8 32. Rxd8 Rxd8 33. Bg4
Rd2 34. b4 Ra2 35. h4 Rxa3 36. Rb7 Na6 37. Rxb6 c5 38. b5 Nb4 39. Be2 Ra1+ 40.
Kh2 Ra2 41. Re6 Nc2 42. Bc4 Ra4 43. Bb3 Rxh4+ 44. Kg3 Rb4 45. Bxc2 Rxb5 46. Rc6
Kh5 47. f4 Ra5 48. Bd1+ Kh6 49. Bf3 Kg7 50. Rc7+ Kh6 51. Bd5 c4 52. Bxc4 g5 53.
f5 Ra3+ 54. Kg4 Ra6 55. Rxh7+ 1-0

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.04.05"]
[Round "9"]
[White "Henao, Raul Fernando"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C73"]
[PlyCount "52"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f6 7. Nc3 g6 8. Be3
Nh6 9. h3 Nf7 10. Qd2 Bg7 11. O-O O-O 12. Ne2 a5 13. Ng3 Be6 14. Nh2 f5 15.
exf5 gxf5 16. f4 Qh4 17. Ne2 e4 18. a4 Rfb8 19. Rab1 Rb4 20. b3 d5 21. Qc3 Nd8
22. Bd2 Rb6 23. Qe3 Nf7 24. g4 Nd6 25. g5 Qh5 26. Kg2 Rbb8 1/2-1/2

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.04.06"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "0-1"]
[ECO "A06"]
[PlyCount "72"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 Nf6 2. b3 d5 3. Bb2 c5 4. e3 a6 5. d4 Nc6 6. Be2 Qa5+ 7. Qd2 Qb6 8. dxc5
Qxc5 9. Ba3 Qb6 10. O-O g6 11. Nc3 Bg7 12. Rad1 Be6 13. Na4 Qc7 14. Nc5 Bc8 15.
c4 dxc4 16. Bxc4 b6 17. Bxf7+ Kxf7 18. Ng5+ Kg8 19. Nce4 Kf8 20. Rc1 Nxe4 21.
Nxe4 Bf5 22. f3 Qd7 23. Qe2 Bxe4 24. fxe4+ Ke8 25. Qc4 Ne5 26. Qb4 Rd8 27. Rfd1
Qc7 28. Qa4+ Rd7 29. Qxa6 Rxd1+ 30. Rxd1 Kf7 31. Rf1+ Bf6 32. Rc1 Qd7 33. Qxb6
Ra8 34. Qc5 Kg7 35. Rf1 Rc8 36. Qd5 Qa7 0-1

[Event "Medellin Fabricato 1st"]
[Site "Medellin"]
[Date "1972.04.08"]
[Round "11"]
[White "Hernandez Onna, Roman"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E91"]
[PlyCount "28"]
[EventDate "1972.03.25"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 d6 6. Be2 Bg4 7. O-O Nfd7 8. Be3
e5 9. d5 Bxf3 10. Bxf3 f5 11. Be2 a5 12. f3 Na6 13. b3 Nac5 14. Qc2 Qh4 1/2-1/2

[Event "Skopje ol (Men) qual-G"]
[Site "Skopje"]
[Date "1972.09.19"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Shaw, Terrey Ian"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2370"]
[BlackElo "2390"]
[PlyCount "127"]
[EventDate "1972.09.18"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Australia"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "AUS"]

1. g3 Nf6 2. Bg2 g6 3. e4 d6 4. d4 Bg7 5. Ne2 O-O 6. O-O c5 7. dxc5 dxc5 8. e5
Ng4 9. f4 Nc6 10. h3 Nh6 11. Nbc3 Nf5 12. Ne4 Qb6 13. c3 c4+ 14. Kh2 Rd8 15.
Qe1 Ne3 16. Bxe3 Qxe3 17. Qf2 Qxf2 18. Rxf2 f6 19. exf6 exf6 20. Raf1 f5 21.
Ng5 h6 22. Nf3 Be6 23. Re1 Bd5 24. g4 fxg4 25. hxg4 Re8 26. Ng3 b5 27. Rxe8+
Rxe8 28. Nd2 Bxg2 29. Kxg2 Kh7 30. Re2 Rxe2+ 31. Nxe2 Kg8 32. Kf3 Kf7 33. Ke4
Ke6 34. Nf3 h5 35. gxh5 gxh5 36. Ng3 b4 37. Nxh5 Bh8 38. f5+ Ke7 39. Kd5 bxc3
40. bxc3 Na5 41. Ne5 Bxe5 42. Kxe5 Nb7 43. Nf4 Nc5 44. Nd5+ Kf7 45. Ne3 Nd7+
46. Kd6 Nb6 47. Kc5 Kf6 48. Nxc4 Nc8 49. Nd6 Ne7 50. Kd4 Nc6+ 51. Ke4 Ne7 52.
c4 Nc6 53. Kf4 a5 54. a4 Nb4 55. Ne4+ Ke7 56. Ke5 Nd3+ 57. Kd4 Nb2 58. Nc3 Kf6
59. c5 Kxf5 60. c6 Ke6 61. Kc5 Nd3+ 62. Kb6 Ne5 63. Nb5 Ng6 64. Kxa5 1-0

[Event "Skopje ol (Men) qual-G"]
[Site "Skopje"]
[Date "1972.09.20"]
[Round "2"]
[White "Timman, Jan H"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E82"]
[WhiteElo "2480"]
[BlackElo "2370"]
[PlyCount "63"]
[EventDate "1972.09.18"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Netherlands"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "COL"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f3 O-O 6. Be3 b6 7. Bd3 a6 8. Nge2 c5
9. e5 Nfd7 10. exd6 exd6 11. Be4 Ra7 12. O-O Nf6 13. Bg5 Bb7 14. Qd2 Nxe4 15.
fxe4 f6 16. Bh4 Nc6 17. Rad1 Qe8 18. Nd5 Qxe4 19. Bxf6 Nxd4 20. Nec3 Qc2 21.
Ne7+ Kh8 22. Qxc2 Nxc2 23. Rxd6 Bxf6 24. Rdxf6 Rxf6 25. Rxf6 Bxg2 26. Rf7 Bb7
27. Nc6 Bxc6 28. Rxa7 a5 29. Nd5 Bxd5 30. cxd5 Kg8 31. d6 Kf8 32. Ra8+ 1-0

[Event "Skopje ol (Men) qual-G"]
[Site "Skopje"]
[Date "1972.09.21"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Muco, Fatos"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "2370"]
[PlyCount "132"]
[EventDate "1972.09.18"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Albania"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ALB"]

1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nc3 Bg7 5. Nf3 O-O 6. Be2 d6 7. O-O Nbd7 8. d5
Ne8 9. Qc2 e5 10. dxe6 fxe6 11. Rd1 Ndf6 12. b3 Bd7 13. Bb2 Qe7 14. Rd2 Bc6 15.
Rad1 Rd8 16. Ne5 Bd7 17. Nxd7 Rxd7 18. Bf3 b6 19. a4 Rd8 20. a5 bxa5 21. Ra1
Nc7 22. Rxa5 a6 23. Ra1 Rb8 24. Rad1 Rfd8 25. Na4 Nfe8 26. Bxg7 Nxg7 27. Qe4
Rxb3 28. Nxc5 Rb4 29. Qc2 Rc8 30. Nd3 Rb6 31. Qa2 Rcb8 32. Nf4 g5 33. Ne2 Nce8
34. Nd4 Qc7 35. h4 gxh4 36. Bg4 Qf7 37. f4 Nf6 38. Bf3 Rc8 39. Qa5 Qc7 40. Qg5
Qf7 41. Qh5 Rxc4 42. g4 Rc5 43. g5 Qg6 44. Rg2 Nd7 45. e4 Nf8 46. Qg4 Qf7 47.
Rh2 e5 48. Nf5 Nxf5 49. exf5 exf4 50. g6 hxg6 51. Be4 Qb3 52. Re1 Qg3+ 53. Qxg3
fxg3 54. Rg2 gxf5 55. Rxg3+ Kf7 56. Rf1 Kf6 57. Bxf5 Rxf5 58. Rxf5+ Kxf5 59.
Rf3+ Ke4 60. Rxf8 d5 61. Kf2 Kd3 62. Rf3+ Kd2 63. Rf4 Rd6 64. Rd4+ Kc3 65. Ra4
Re6 66. Ra3+ Kb4 0-1

[Event "Skopje ol (Men) qual-G"]
[Site "Skopje"]
[Date "1972.09.23"]
[Round "5"]
[White "De la Casa, Angel"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "E70"]
[BlackElo "2370"]
[PlyCount "42"]
[EventDate "1972.09.18"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Andorra"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "AND"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Bd3 d6 6. Nge2 e5 7. d5 Nh5 8. O-O
f5 9. a4 a5 10. Bd2 Na6 11. Rc1 Nc5 12. Bc2 f4 13. f3 g5 14. b4 axb4 15. Na2 g4
16. Nxb4 g3 17. Be1 Qh4 18. hxg3 fxg3 19. Bxg3 Nxg3 20. Qe1 Qh1+ 21. Kf2 Qxf1+
0-1

[Event "Skopje ol (Men) qual-G"]
[Site "Skopje"]
[Date "1972.09.24"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Saleem, Khalid1"]
[Result "1/2-1/2"]
[ECO "D05"]
[WhiteElo "2370"]
[PlyCount "99"]
[EventDate "1972.09.18"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Iraq"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "IRQ"]

1. d4 d5 2. Nf3 Nf6 3. e3 c5 4. c3 e6 5. Bd3 Bd6 6. Nbd2 Bd7 7. O-O Bc6 8. Ne5
O-O 9. f4 cxd4 10. exd4 b6 11. Qf3 Bb7 12. g4 Nfd7 13. Qh3 g6 14. Ndf3 f6 15.
Nxd7 Qxd7 16. Re1 Nc6 17. g5 f5 18. Re2 Rae8 19. Bd2 Nb8 20. Ne1 Ba6 21. a4
Bxd3 22. Qxd3 Qc7 23. Ng2 Nd7 24. a5 Nb8 25. axb6 axb6 26. b3 Re7 27. c4 Rfe8
28. Be3 Rc8 29. Rc2 Qb7 30. Ne1 Nc6 31. cxd5 Nb4 32. Rxc8+ Qxc8 33. Qd2 exd5
34. Nd3 Nxd3 35. Qxd3 Qe6 36. Kf2 Bb4 37. h4 Kg7 38. Rc1 Ba5 39. Rc2 Be1+ 40.
Kxe1 Qxe3+ 41. Qxe3 Rxe3+ 42. Kd2 Rxb3 43. Rc7+ Kg8 44. Rd7 Rb4 45. Kc3 Kh8 46.
Kc2 Kg8 47. Rd8+ Kg7 48. Rd7+ Kg8 49. Rd8+ Kg7 50. Rd7+ 1/2-1/2

[Event "Skopje ol (Men) qual-G"]
[Site "Skopje"]
[Date "1972.09.25"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Padevsky, Nikola"]
[Result "1/2-1/2"]
[ECO "E19"]
[WhiteElo "2370"]
[BlackElo "2430"]
[PlyCount "22"]
[EventDate "1972.09.18"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Bulgaria"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "BUL"]

1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2
Nxc3 9. Qxc3 f5 10. b3 Bf6 11. Bb2 Qe7 1/2-1/2

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.09.27"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Thorvaldsson, Jonas"]
[Result "1-0"]
[ECO "E46"]
[WhiteElo "2370"]
[BlackElo "2390"]
[PlyCount "45"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Island"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ISL"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nge2 O-O 6. a3 Bxc3+ 7. Nxc3 d6 8.
Be2 Nc6 9. O-O e5 10. dxc5 dxc5 11. Qc2 Be6 12. Rd1 Nd7 13. Nd5 Kh8 14. Bd2 Rc8
15. Qb3 b6 16. Qa4 Qh4 17. Be1 f5 18. f4 Qh6 19. b4 cxb4 20. axb4 Rfe8 21. Bf3
e4 22. Be2 Qg6 23. Qa3 1-0

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.09.29"]
[Round "3"]
[White "Whiteley, Andrew J"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E63"]
[WhiteElo "2310"]
[BlackElo "2370"]
[PlyCount "60"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "England"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "ENG"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d6 5. Nf3 O-O 6. O-O Nc6 7. Nc3 a6 8. h3
Rb8 9. Be3 b5 10. Nd2 Bd7 11. Rb1 Na5 12. cxb5 axb5 13. b4 Nc4 14. Nxc4 bxc4
15. b5 Qe8 16. a4 c6 17. Rc1 d5 18. Bf4 Rb7 19. e4 e6 20. Bg5 h6 21. Bxf6 Bxf6
22. Qf3 Bxd4 23. bxc6 Bxc6 24. exd5 exd5 25. Nxd5 Rb3 26. Ne7+ Qxe7 27. Qxc6
Rxg3 28. Rxc4 Rd8 29. Rxd4 Rxg2+ 30. Kxg2 Rxd4 1/2-1/2

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.09.30"]
[Round "4"]
[White "Balshan, Amikam"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E63"]
[BlackElo "2370"]
[PlyCount "83"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Israel"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "ISR"]
[BlackTeamCountry "COL"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. d4 a6 8. h3
Rb8 9. Be3 b5 10. Nd2 Bd7 11. a3 e5 12. dxe5 Nxe5 13. cxb5 axb5 14. f4 Nc6 15.
Rc1 Qe8 16. Bf2 b4 17. Na2 bxa3 18. bxa3 Rb2 19. Nc3 Na5 20. Rc2 Rxc2 21. Qxc2
Bc6 22. e4 Qa8 23. Rb1 Rb8 24. Rb4 Nd7 25. Nd5 Bxd5 26. exd5 Rc8 27. Rb5 Nb6
28. h4 Nb7 29. Kh2 Nc5 30. Bxc5 dxc5 31. Rxc5 Qxa3 32. Rxc7 Rxc7 33. Qxc7 Qe3
34. Nf3 Bf6 35. Ne5 Bxe5 36. fxe5 Qf2 37. e6 Nxd5 38. Qxf7+ Qxf7 39. exf7+ Kxf7
40. Bxd5+ Kg7 41. Kg2 h5 42. Kf3 1-0

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.10.01"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Cappello, Guido"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2370"]
[PlyCount "83"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Italy"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ITA"]

1. d4 e6 2. Nf3 f5 3. Bg5 Be7 4. h4 d6 5. Nbd2 Nd7 6. e4 fxe4 7. Nxe4 Ndf6 8.
Bd3 Nxe4 9. Bxe4 Nf6 10. Bd3 c6 11. Qe2 Bd7 12. Bd2 Bf8 13. O-O-O Qe7 14. Rhe1
O-O-O 15. Kb1 Re8 16. c4 g6 17. Bg5 h6 18. Bf4 Nh5 19. Bh2 g5 20. Bg6 Nf4 21.
Bxf4 gxf4 22. Bxe8 Qxe8 23. c5 Qg6+ 24. Qe4 Rg8 25. cxd6 Bxd6 26. Qxg6 Rxg6 27.
Ne5 Be8 28. Nxg6 Bxg6+ 29. Kc1 Kd7 30. Re5 b6 31. g4 fxg3 32. fxg3 Bf5 33. Rf1
Bxe5 34. dxe5 c5 35. h5 Kc6 36. Rd1 c4 37. Rd6+ Kc5 38. Kd2 a5 39. a4 Bg4 40.
Kc3 Bxh5 41. Rxe6 Bd1 42. Rxh6 1-0

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.10.02"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Strobel, Ferdinand"]
[Result "1/2-1/2"]
[ECO "A89"]
[WhiteElo "2370"]
[PlyCount "64"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Austria"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "AUT"]

1. d4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 Nc6 8. Qc2
e5 9. dxe5 dxe5 10. Rd1 Qe7 11. Nd5 Nxd5 12. cxd5 Nb4 13. Qb3 Qd6 14. Ng5 Bf6
15. Ne6 Rf7 16. Be3 b6 17. Rac1 Na6 18. Rc6 Qb4 19. Qxb4 Nxb4 20. Rxc7 Bxe6 21.
dxe6 Rxc7 22. Bxa8 Re7 23. Bd2 Na6 24. Bh6 Nc7 25. Rd8+ Re8 26. Rxe8+ Nxe8 27.
Bd5 Be7 28. e4 fxe4 29. h4 Nf6 30. Bc4 Ng4 31. Bg5 Kf8 32. Be2 Bxg5 1/2-1/2

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.10.03"]
[Round "7"]
[White "De Greif, Boris"]
[Black "De Castro, Edgar"]
[Result "1/2-1/2"]
[ECO "D94"]
[WhiteElo "2370"]
[BlackElo "2320"]
[PlyCount "26"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Philippines"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "PHI"]

1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nf3 Bg7 5. Nc3 O-O 6. Be2 d5 7. dxc5 Qa5 8. O-O
dxc4 9. Bxc4 Qxc5 10. Be2 Nc6 11. e4 Re8 12. Be3 Qa5 13. Qb3 Qb4 1/2-1/2

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.10.04"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Makropoulos, Georgios"]
[Result "1/2-1/2"]
[ECO "A26"]
[WhiteElo "2370"]
[PlyCount "62"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Greece"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "GRE"]

1. c4 e5 2. g3 d6 3. Bg2 Nc6 4. Nc3 g6 5. d3 Bg7 6. Nf3 h6 7. Bd2 Be6 8. Rb1
Qd7 9. b4 Nf6 10. b5 Nd8 11. h3 O-O 12. Qc1 Kh7 13. g4 Ng8 14. e4 f5 15. gxf5
gxf5 16. Nh4 f4 17. Nf5 Ne7 18. Nxg7 Kxg7 19. Bf3 Kh7 20. Kd1 Nc8 21. Kc2 a6
22. a4 axb5 23. axb5 Bxh3 24. Kb2 Rf6 25. Ra1 Rxa1 26. Kxa1 Rg6 27. Rh2 Bg4 28.
Qd1 Bxf3 29. Qxf3 Ne6 30. Qh3 Qe8 31. f3 Qd8 1/2-1/2

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.10.08"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Muco, Fatos"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2370"]
[PlyCount "56"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Albania"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ALB"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 e5 5. dxe5 Qxe5+ 6. Be3 Nf6 7. Nf3 Qc7 8.
Bb5+ Bd7 9. Na3 Be7 10. O-O O-O 11. Qa4 a6 12. Bxd7 Nbxd7 13. Bf4 Bd6 14. Bxd6
Qxd6 15. Rad1 Qc7 16. Qh4 b5 17. Nc2 Rfe8 18. Rfe1 Rad8 19. a4 Ne5 20. Nxe5
Rxd1 21. Rxd1 Qxe5 22. Ne3 h5 23. axb5 axb5 24. Qg3 Qxg3 25. hxg3 Ra8 26. f3
Ra2 27. Rd2 c4 28. Kf2 g6 1/2-1/2

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.10.09"]
[Round "12"]
[White "Wostin, Rik Hendrik"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[BlackElo "2370"]
[PlyCount "62"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Belgium"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "BEL"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. Nc3 Ng6 5. d4 exd4 6. Nxd4 Bc5 7. Be3 Bxd4
8. Bxd4 O-O 9. Be3 d6 10. Qe2 f5 11. exf5 Bxf5 12. O-O-O Nce5 13. h3 Be6 14. g3
a6 15. Ba4 b5 16. Bb3 Bxb3 17. axb3 Qd7 18. f4 Nc6 19. Qh5 Nce7 20. Rhe1 a5 21.
Qxb5 Qxh3 22. Qc4+ Kh8 23. Qxc7 Qxg3 24. Ne4 Qg2 25. Nxd6 Nd5 26. Qc4 Nxe3 27.
Rxe3 Rxf4 28. Nf7+ Kg8 29. Nh6+ Kh8 30. Nf7+ Kg8 31. Nh6+ Kh8 1/2-1/2

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.10.10"]
[Round "13"]
[White "Sampouw, Jacobus S"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B76"]
[BlackElo "2370"]
[PlyCount "81"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Indonesia"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "INA"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nc3 g6 3. Nf3 Bg7 4. d4 Qa5 5. Be3 Nf6 6. Nd2 cxd4 7. Nb3 Qd8 8.
Nxd4 d6 9. f3 O-O 10. Qd2 Nc6 11. g4 Nxd4 12. Bxd4 Be6 13. h4 Qa5 14. h5 Rfc8
15. a3 b5 16. hxg6 fxg6 17. g5 Nh5 18. Bxg7 Nxg7 19. Bh3 Rxc3 20. Qxc3 Qxc3+
21. bxc3 Bxh3 22. Rxh3 Ne6 23. Rg3 Rc8 24. Kd2 Rc5 25. Rag1 Nf4 26. Rg4 e5 27.
Rb1 Ne6 28. c4 Rxc4 29. Rxb5 Nd4 30. Rb8+ Kf7 31. Rb7+ Ke6 32. c3 Nxf3+ 33. Kd3
Rc8 34. Rg3 Rf8 35. Ke2 Nh4 36. Rxa7 d5 37. Ra6+ Kd7 38. Rd3 Kc7 39. Rxd5 Nf3
40. Rf6 Rxf6 41. gxf6 1-0

[Event "Skopje ol (Men) fin-B"]
[Site "Skopje"]
[Date "1972.10.11"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Cobo Arteaga, Eldis"]
[Result "1/2-1/2"]
[ECO "D13"]
[WhiteElo "2370"]
[BlackElo "2420"]
[PlyCount "33"]
[EventDate "1972.09.27"]
[EventType "team"]
[EventRounds "15"]
[EventCountry "YUG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Cuba"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "CUB"]

1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 e6 7. e3 Bd6 8.
Bxd6 Qxd6 9. Be2 O-O 10. O-O Bd7 11. Rc1 Rfc8 12. Qd3 Na5 13. Ne5 Nc4 14. Nxd7
Qxd7 15. b3 Nd6 16. Nb5 Nxb5 17. Qxb5 1/2-1/2

[Event "COL-ch22"]
[Site "Barranquilla"]
[Date "1972.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Avella, Eduardo"]
[Result "1-0"]
[ECO "A04"]
[PlyCount "119"]
[EventDate "1972.12.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. Nf3 e5 2. Nxe5 Nc6 3. Nf3 d5 4. g3 Nf6 5. Bg2 Bd6 6. d3 Be6 7. c3 h6 8. Nbd2
Qd7 9. Qa4 O-O 10. O-O Rfe8 11. Re1 a6 12. Nf1 b5 13. Qc2 Bh3 14. Be3 Ne7 15.
b4 Bxg2 16. Kxg2 Nf5 17. a4 Ng4 18. Bd4 Rab8 19. axb5 axb5 20. h3 Nxd4 21. Nxd4
Nxf2 22. Kxf2 Qxh3 23. e4 Re6 24. Nf5 Rf6 25. Kg1 dxe4 26. dxe4 Be5 27. Re3 Re8
28. Qh2 Qg4 29. Qh4 Qg6 30. Rd1 Rfe6 31. Rd8 Bf6 32. Rxe8+ Rxe8 33. Qh3 Bg5 34.
Re2 Qc6 35. g4 Rxe4 36. Rxe4 Qxe4 37. Qg2 Qc4 38. Qf3 g6 39. N5g3 Kg7 40. Ne4
Be7 41. Ne3 Qa2 42. Qd1 Qa7 43. Kf2 c6 44. Kf3 c5 45. Nd5 cxb4 46. Nxe7 Qxe7
47. Qd4+ f6 48. cxb4 Qf7 49. Qc3 g5 50. Ng3 Qd5+ 51. Kf2 Qa2+ 52. Kg1 Qe6 53.
Qd4 Kf7 54. Kg2 Qc6+ 55. Kh3 Qe6 56. Qd3 Qb6 57. Qh7+ Ke6 58. Qe4+ Kf7 59. Nf5
Kg6 60. Qe8+ 1-0

[Event "COL-ch22"]
[Site "Barranquilla"]
[Date "1972.??.??"]
[Round "2"]
[White "Garcia, Luis E"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A47"]
[PlyCount "83"]
[EventDate "1972.12.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. Nf3 b6 3. Bf4 e6 4. e3 Bb7 5. Nbd2 Be7 6. Bd3 c5 7. O-O Nc6 8. c3
O-O 9. h3 cxd4 10. exd4 Nd5 11. Bh2 f5 12. Nc4 d6 13. Re1 Qd7 14. Qe2 Nd8 15.
Ne3 Nxe3 16. Qxe3 Rf6 17. Re2 Rg6 18. Bg3 h5 19. Ne1 Nf7 20. Bxf5 exf5 21. Qxe7
Qxe7 22. Rxe7 Be4 23. Bf4 Kf8 24. Rc7 Ke8 25. c4 Rf6 26. f3 Kd8 27. Rxf7 Rxf7
28. fxe4 fxe4 29. Bxd6 Kd7 30. c5 Re8 31. Nc2 e3 32. Rf1 Rxf1+ 33. Kxf1 e2+ 34.
Ke1 Re4 35. b4 Kc6 36. Be5 bxc5 37. bxc5 a5 38. Bxg7 Kd5 39. Kd2 Re8 40. Be5
Rg8 41. g3 Kc4 42. c6 1-0

[Event "COL-ch22"]
[Site "Barranquilla"]
[Date "1972.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Silva, Marco A"]
[Result "1-0"]
[ECO "D56"]
[PlyCount "79"]
[EventDate "1972.12.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 a6 8. Bxf6
Bxf6 9. cxd5 exd5 10. Qb3 c6 11. Be2 Re8 12. O-O Nd7 13. Rfd1 Qe7 14. Rac1 Nf8
15. Ne1 Bg5 16. Na4 f5 17. Bf3 Ne6 18. Bh5 Rf8 19. f4 Bf6 20. Nb6 Rb8 21. Bg6
Bxd4 22. Nxc8 Rbxc8 23. Rxd4 Nxd4 24. exd4 Qf6 25. Qg3 Qxd4+ 26. Qf2 Qxf2+ 27.
Kxf2 c5 28. Nd3 Rc6 29. Bh5 c4 30. Ne5 Rd6 31. Rd1 b5 32. Ke3 g5 33. g3 Kg7 34.
Kd4 Kf6 35. Bf3 Rfd8 36. a3 g4 37. Bg2 a5 38. Kc5 Ke6 39. Re1 Rc8+ 40. Nc6+ 1-0

[Event "COL-ch22"]
[Site "Barranquilla"]
[Date "1972.??.??"]
[Round "4"]
[White "Guerrero, Alvaro P"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E91"]
[PlyCount "67"]
[EventDate "1972.12.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 d6 6. Be2 Bg4 7. O-O Nfd7 8. Be3
e5 9. d5 Bxf3 10. Bxf3 f5 11. b4 a5 12. a3 axb4 13. axb4 Rxa1 14. Qxa1 Na6 15.
Rb1 Nf6 16. Bg5 Qd7 17. Bxf6 Bxf6 18. Qa3 Be7 19. Na4 Ra8 20. Nb2 Rf8 21. Nd3
fxe4 22. Bxe4 Qg4 23. f3 Qg5 24. Qc1 Nb8 25. Qxg5 Bxg5 26. Kf2 Nd7 27. c5 Ra8
28. Rb2 Kf8 29. g3 Ra3 30. Ke2 Ke7 31. h4 Bh6 32. g4 Bf4 33. Rc2 Kd8 34. b5
1/2-1/2

[Event "COL-ch22"]
[Site "Barranquilla"]
[Date "1972.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Alzate, Javier"]
[Result "1/2-1/2"]
[ECO "D34"]
[PlyCount "68"]
[EventDate "1972.12.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. Nf3 c5 2. g3 d5 3. Bg2 Nf6 4. O-O Nc6 5. d4 e6 6. c4 cxd4 7. Nxd4 Be7 8. Nc3
O-O 9. cxd5 exd5 10. Be3 Be6 11. Rc1 Qd7 12. Nb3 Rfd8 13. Bc5 Rac8 14. Bxe7
Qxe7 15. Nd4 Qb4 16. Nxc6 bxc6 17. Qc2 c5 18. Na4 c4 19. a3 Qa5 20. e3 d4 21.
exd4 Rxd4 22. Nc3 Bf5 23. Qa4 Qxa4 24. Nxa4 Bd7 25. Nc3 Rd2 26. Nd1 Ba4 27. Ne3
Bb3 28. Rc3 Rxb2 29. Rfc1 h5 30. Nxc4 Rxc4 31. Rxc4 Bxc4 32. Rxc4 Ng4 33. Rc8+
Kh7 34. Be4+ g6 1/2-1/2

[Event "COL-ch22"]
[Site "Barranquilla"]
[Date "1972.??.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Cuartas, Carlos Enrique"]
[Result "1/2-1/2"]
[ECO "A15"]
[WhiteElo "2370"]
[BlackElo "2330"]
[PlyCount "81"]
[EventDate "1972.12.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d3 d5 5. O-O O-O 6. Nbd2 Nc6 7. c4 e5 8. cxd5
Nxd5 9. Nc4 Nb6 10. Qc2 Bg4 11. Be3 Qd7 12. Rfc1 Rfe8 13. Nxb6 axb6 14. a3 Re7
15. Ng5 h6 16. h3 Bf5 17. g4 hxg5 18. gxf5 Qxf5 19. Bxc6 bxc6 20. Qxc6 Rae8 21.
Qg2 e4 22. d4 Rd7 23. Rc4 Qb5 24. Rac1 Qxb2 25. Qg4 Rd5 26. Rxc7 Bxd4 27. Rc8
Rdd8 28. Rxd8 Rxd8 29. Qxg5 Bf6 30. Qg4 Re8 31. Rc8 Rxc8 32. Qxc8+ Kg7 33. Qc4
Qb1+ 34. Kg2 b5 35. Qd5 b4 36. axb4 Qxb4 37. Bg5 Bxg5 38. Qxg5 Qd4 39. e3 Qd6
40. h4 Qf6 41. Qg4 1/2-1/2

[Event "COL-ch22"]
[Site "Barranquilla"]
[Date "1972.??.??"]
[Round "7"]
[White "Mendoza, Luis"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B34"]
[PlyCount "85"]
[EventDate "1972.12.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be2 Bg7 6. Be3 Nf6 7. Nc3 O-O 8.
Qd2 d5 9. Nxc6 bxc6 10. Rd1 Qa5 11. exd5 Nxd5 12. Nxd5 Qxd5 13. Qxd5 cxd5 14.
Rxd5 Be6 15. Rb5 Rfc8 16. Bf3 Bd7 17. Rb3 Be6 18. Bxa8 Bxb3 19. axb3 Rxa8 20.
c3 Rb8 21. Kd2 Rxb3 22. Kc2 Rb5 23. Ra1 Be5 24. Rxa7 Bxh2 25. c4 Rb8 26. Rxe7
Rc8 27. c5 Bd6 28. Re4 f5 29. Rc4 f4 30. Bd4 Be7 31. b4 Kf7 32. b5 Ke6 33. b6
Kd5 34. b7 Rb8 35. c6 Bd6 36. Kd3 Bc7 37. Rc5+ Ke6 38. Ke4 Rf8 39. Re5+ Kd6 40.
Bc5+ Kxc6 41. Bxf8 Bxe5 42. Kxe5 Kxb7 43. Kxf4 1-0

[Event "COL-ch22"]
[Site "Barranquilla"]
[Date "1972.??.??"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Vallejo, Humberto"]
[Result "1-0"]
[ECO "D03"]
[PlyCount "87"]
[EventDate "1972.12.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 Bg4 6. Be2 Nbd7 7. O-O h6 8.
Bf4 Nh5 9. Be5 f6 10. Bg3 Nxg3 11. hxg3 c6 12. Nh4 Bxe2 13. Qxe2 Nf8 14. c4 e6
15. cxd5 Qxd5 16. Rfc1 h5 17. Rc5 Qd7 18. b4 g5 19. Nhf3 Ng6 20. b5 g4 21. bxc6
bxc6 22. Nh4 Nxh4 23. gxh4 Bf8 24. Ne4 Be7 25. Rc2 f5 26. Nc5 Qd5 27. g3 Kf7
28. Qc4 Rhb8 29. Nd3 Rb6 30. Qxd5 cxd5 31. Rc7 Kf6 32. Ne5 Rb2 33. a4 a5 34.
Rac1 Re8 35. Ra7 Bf8 36. Nd3 Ra2 37. Rxa5 Rb8 38. Nf4 Be7 39. Nxh5+ Kf7 40. Rc7
Rbb2 41. Raa7 Ra1+ 42. Kg2 Raa2 43. Rxe7+ Kg6 44. Rxe6+ 1-0

[Event "COL-ch22"]
[Site "Barranquilla"]
[Date "1972.??.??"]
[Round "9"]
[White "Gutierrez Castillo, Jose Antonio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C50"]
[PlyCount "140"]
[EventDate "1972.12.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Bc5 5. O-O d6 6. d3 Bg4 7. Bb5 Nd7 8.
Bxc6 bxc6 9. Be3 Qf6 10. h3 Bxf3 11. Qxf3 Qxf3 12. gxf3 O-O 13. f4 exf4 14.
Bxf4 f5 15. Be3 f4 16. Bxc5 Nxc5 17. Kh2 Ne6 18. Ne2 Rab8 19. b3 Rb5 20. Rg1
Rh5 21. Rg4 Rf6 22. Rag1 g5 23. Rh1 f3 24. Ng1 Nd4 25. Rg3 Kf7 26. c3 Nb5 27.
Nxf3 g4 28. c4 Nc3 29. Nd4 Rxf2+ 30. Kg1 Rxa2 31. Rxg4 Ra1+ 32. Kg2 Rxh1 33.
Kxh1 Rxh3+ 34. Kg2 Rxd3 35. Nxc6 Re3 36. Rh4 Kg6 37. Ne7+ Kg5 38. Rxh7 Nxe4 39.
Nc6 Rg3+ 40. Kf1 Rxb3 41. Nxa7 c5 42. Ke2 Kf5 43. Nb5 d5 44. Rh5+ Ng5 45. Nd6+
Kg4 46. Rh8 Rb6 47. Rd8 Rb2+ 48. Kd1 d4 49. Nb5 Nf3 50. Rd5 Kf4 51. Kc1 Rg2 52.
Rxc5 d3 53. Rd5 Ke3 54. c5 Rc2+ 55. Kb1 Nd2+ 56. Ka1 Nb3+ 57. Kb1 Nxc5 58. Re5+
Kf4 59. Rd5 Ke4 60. Rd8 Na4 61. Rd4+ Ke3 62. Rxa4 Rc5 63. Nd4 d2 64. Nc2+ Kf3
65. Ra3+ Ke2 66. Re3+ Kf2 67. Rd3 Rb5+ 68. Ka2 Ke2 69. Re3+ Kf2 70. Rd3 Ke2
1/2-1/2

[Event "Capablanca Memorial"]
[Site "Cienfuegos"]
[Date "1973.??.??"]
[Round "?"]
[White "Damjanovic, Mato"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "C60"]
[PlyCount "64"]
[EventDate "1973.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8.
exd5 Nxd5 9. Re1+ Be6 10. Bg5 Qd6 11. Nc3 O-O 12. h3 Rfb8 13. Ne4 Qb4 14. Bxc6
bxc6 15. b3 a5 16. Ne5 Bxe5 17. dxe5 a4 18. Qf3 Qf8 19. bxa4 Rxa4 20. Rec1 h6
21. Be3 Bf5 22. Nc5 Ra3 23. g4 Bc8 24. Ne4 Qe7 25. Nf6+ Nxf6 26. exf6 Qe8 27.
Qf4 g5 28. Qxc7 Rxe3 29. Qxb8 Rxh3 30. Re1 Qd7 31. Rad1 Qxg4+ 32. Kf1 Rh1# 0-1

[Event "Capablanca Memorial"]
[Site "Cienfuegos"]
[Date "1973.??.??"]
[Round "?"]
[White "De Greif, Boris"]
[Black "Cobo Arteaga, Eldis"]
[Result "1/2-1/2"]
[ECO "D03"]
[PlyCount "37"]
[EventDate "1973.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1998.11.10"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 Bf5 6. c3 O-O 7. Be2 Nbd7 8.
O-O c6 9. Qb3 Qb6 10. Rfc1 Rfe8 11. h3 Ne4 12. g4 Nxd2 13. Nxd2 Be6 14. f4 f6
15. Bh4 Bf7 16. Qxb6 axb6 17. Kf2 e5 18. Nf3 b5 19. Bg3 1/2-1/2

[Event "Capablanca Memorial"]
[Site "Cienfuegos"]
[Date "1973.??.??"]
[Round "?"]
[White "De Greif, Boris"]
[Black "Diaz, Joaquin Carlos"]
[Result "1-0"]
[ECO "A04"]
[PlyCount "71"]
[EventDate "1973.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1998.11.10"]

1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. d3 e6 6. Nc3 Nge7 7. Ne4 d6 8. Bg5
f5 9. Nc3 h6 10. Bd2 O-O 11. e4 d5 12. exd5 exd5 13. Re1 b6 14. Bf4 g5 15. Be5
Nxe5 16. Nxe5 Bb7 17. f4 gxf4 18. gxf4 Kh7 19. Qh5 Rb8 20. d4 cxd4 21. Nb5 d3
22. Nf7 Qd7 23. Nbd6 dxc2 24. Re6 Rxf7 25. Qxf7 Qc6 26. Rc1 Qc5+ 27. Kh1 Rf8
28. Qxe7 d4 29. Bxb7 d3 30. Nc4 Qxc4 31. Rg1 Qd4 32. Rxh6+ Kg8 33. Rhg6 Rf7 34.
Qe8+ Rf8 35. Qe6+ Rf7 36. Bd5 1-0

[Event "Capablanca Memorial"]
[Site "Cienfuegos"]
[Date "1973.??.??"]
[Round "?"]
[White "De Greif, Boris"]
[Black "Donner, Jan Hein"]
[Result "0-1"]
[ECO "B07"]
[PlyCount "110"]
[EventDate "1973.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1998.11.10"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. h4 Nc6 6. Be3 h5 7. Qd2 e5 8. d5 Nd4
9. f3 c5 10. Nd1 Bd7 11. c3 Nxe2 12. Nxe2 Ng8 13. Nf2 f5 14. Bg5 Bf6 15. O-O-O
f4 16. Bxf6 Qxf6 17. Rdg1 Nh6 18. Nh3 Nf7 19. g3 fxg3 20. Ng5 Nxg5 21. Qxg5
Qxg5+ 22. hxg5 h4 23. Nxg3 Ke7 24. Nf1 Raf8 25. Nh2 Rh5 26. Kd2 b5 27. Ke3 a5
28. Ng4 Rxg5 29. Rxh4 Rh5 30. Rxh5 gxh5 31. Nh2 Kf6 32. f4 exf4+ 33. Kxf4 Ke7+
34. Ke3 Kf6 35. Kf4 Rh8 36. Rg5 h4 37. e5+ dxe5+ 38. Rxe5 h3 39. Re1 Rh4+ 40.
Kg3 Rh5 41. Ng4+ Bxg4 42. Kxg4 Rh8 43. Kg3 Rh5 44. a4 h2 45. Rh1 Ke5 46. Rxh2
Rxh2 47. Kxh2 Kxd5 48. axb5 c4 49. Kg3 Kc5 50. Kf4 Kxb5 51. Ke3 Ka4 52. Kd2 Kb3
53. Kc1 a4 54. Kb1 a3 55. bxa3 Kxa3 0-1

[Event "Capablanca Memorial"]
[Site "Cienfuegos"]
[Date "1973.??.??"]
[Round "?"]
[White "Smyslov, Vassily"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C60"]
[PlyCount "86"]
[EventDate "1973.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1998.11.10"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8.
exd5 Nxd5 9. Re1+ Be6 10. Ne5 Qd6 11. Nd2 O-O 12. Ne4 Qb4 13. Bxc6 bxc6 14.
Nxc6 Qb6 15. Ne5 f6 16. Nc4 Qb5 17. b3 Rfe8 18. Bb2 Nb6 19. Ncd2 f5 20. Nc5 Bd5
21. Nf3 Rxe1+ 22. Nxe1 Nd7 23. Rc1 Nxc5 24. dxc5 Qc6 25. Bxg7 Kxg7 26. Qd4+ Kg8
27. f3 Rd8 28. Nd3 Qa8 29. Qe3 Re8 30. Ne5 c6 31. Qd4 Qb7 32. Nd3 Qe7 33. Re1
Qxe1+ 34. Nxe1 Rxe1+ 35. Kf2 Rc1 36. Qd2 Rxc5 37. a4 Kf7 38. Kg3 a5 39. Qe3 Rc2
40. Qa7+ Kf6 41. Qxa5 g5 42. Qd8+ Kg6 43. h4 f4+ 1-0

[Event "Capablanca Memorial"]
[Site "Cienfuegos"]
[Date "1973.??.??"]
[Round "?"]
[White "Uhlmann, Wolfgang"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A88"]
[PlyCount "97"]
[EventDate "1973.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1998.11.10"]

1. c4 f5 2. Nc3 Nf6 3. Nf3 g6 4. g3 Bg7 5. d4 O-O 6. Bg2 d6 7. O-O c6 8. d5 c5
9. Rb1 Na6 10. a3 Nc7 11. b4 b6 12. Qd3 Ne4 13. Bb2 Qe8 14. Nd2 Nxd2 15. Qxd2
Qf7 16. f4 Ba6 17. Qd3 Rad8 18. Rfe1 Bc8 19. e4 Bd4+ 20. Kh1 e5 21. dxe6 Bxe6
22. Nd5 fxe4 23. Bxe4 Nxd5 24. cxd5 Bxd5 25. Bxd4 Bxe4+ 26. Rxe4 cxd4 27. Qxd4
Rfe8 28. Rbe1 Rxe4 29. Qxe4 Rc8 30. Kg2 Qc4 31. Qxc4+ Rxc4 32. Re8+ Kf7 33. Rh8
Rc2+ 34. Kh3 Ke6 35. Rxh7 d5 36. Rg7 d4 37. Rxg6+ Kf5 38. Rd6 Ke4 39. f5 Ra2
40. Kg4 Rxh2 41. Kg5 Rh8 42. Re6+ Kf3 43. f6 Kxg3 44. Rd6 Rh4 45. f7 Rg4+ 46.
Kf6 Rf4+ 47. Ke7 Re4+ 48. Re6 Rf4 49. Rf6 1-0

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "1"]
[White "Levy, David Neil Lawrence"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C40"]
[PlyCount "211"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Qe7 3. Bc4 d6 4. h3 g6 5. O-O Bg7 6. Nc3 c6 7. a4 Nf6 8. d4 O-O
9. dxe5 dxe5 10. Qe2 Nh5 11. Bg5 Bf6 12. Bh6 Bg7 13. Qe3 Bxh6 14. Qxh6 Qf6 15.
Rad1 Nd7 16. Rd2 Qg7 17. Qxg7+ Kxg7 18. Rfd1 Nhf6 19. g4 Nc5 20. Nxe5 Nfxe4 21.
Nxe4 Nxe4 22. Rd8 Be6 23. Rxa8 Rxa8 24. Bxe6 Re8 25. Rd7 Rxe6 26. Nxf7 Nc5 27.
Ng5+ Nxd7 28. Nxe6+ Kf6 29. Nd8 Nc5 30. b4 Nxa4 31. Nxb7 Ke5 32. Kg2 Kd5 33.
Na5 Nc3 34. Kf3 Na2 35. c4+ Kd6 36. b5 cxb5 37. cxb5 Kc5 38. Nc6 Kxb5 39. Nxa7+
Kc4 40. Nc8 Nc3 41. Kf4 Kd5 42. f3 Ne2+ 43. Ke3 Nc3 44. h4 Ke6 45. Kf4 h6 46.
Nb6 Ne2+ 47. Ke3 Nc3 48. Kd3 Nb5 49. Nc4 Nc7 50. Ke4 Kf6 51. Ne3 Nb5 52. Nd5+
Ke6 53. Nf4+ Kf6 54. Ne2 Nc7 55. Ng3 Ne6 56. Ne2 Nc5+ 57. Ke3 Nd7 58. Kd4 Ne5
59. Ke4 Nc4 60. Ng3 Ke6 61. h5 Nd6+ 62. Ke3 g5 63. Kd4 Nf7 64. Nf5 Ne5 65. Ke3
Nf7 66. Ke4 Kf6 67. Kd5 Ne5 68. Nd4 Nf7 69. Nc6 Nh8 70. Ne5 Ke7 71. Nc4 Nf7 72.
Nd2 Kf6 73. Ne4+ Ke7 74. Kd4 Ke6 75. Nc5+ Kd6 76. Nb7+ Ke6 77. Ke4 Ne5 78. Nc5+
Kf6 79. Nb3 Ke6 80. Nd4+ Kf6 81. Nb5 Ke6 82. Nc3 Nc4 83. Ne2 Nd2+ 84. Ke3 Nc4+
85. Kd3 Ne5+ 86. Ke4 Nf7 87. Nd4+ Kf6 88. Kd5 Ke7 89. Nf5+ Kd7 90. Ng3 Ke7 91.
Ne4 Kd7 92. Nc5+ Ke7 93. Nb7 Kd7 94. Na5 Ke7 95. Nc4 Kd7 96. Na3 Ke7 97. Nb5
Kd7 98. Nd4 Ke7 99. Ne6 Kd7 100. Nf8+ Ke7 101. Nh7 Kd7 102. Nf6+ Ke7 103. Ng8+
Kf8 104. Nf6 Ke7 105. Nh7 Kd7 106. f4 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "2"]
[White "Serrano, Waldo"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A77"]
[PlyCount "75"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nc3 Bg7 5. Nf3 O-O 6. d5 d6 7. Be2 e6 8. O-O
exd5 9. cxd5 Re8 10. Nd2 a6 11. a4 Nbd7 12. Qc2 Ne5 13. b3 Bf5 14. e4 Bd7 15.
Bb2 g5 16. Rfe1 g4 17. Nc4 Qe7 18. Nb6 Rad8 19. Nd1 Nh5 20. Nxd7 Rxd7 21. Ne3
Qg5 22. Bxe5 Bxe5 23. Bxg4 Rde7 24. Rad1 Nf6 25. Bf5 Bd4 26. Nf1 Nxd5 27. Bxh7+
Kg7 28. Bf5 Nc3 29. Rd3 Nxe4 30. Rxe4 Rxe4 31. Rg3 Qxg3 32. hxg3 Re2 33. Qc1
Rxf2 34. Qg5+ Kf8 35. Qh6+ Ke7 36. Qg5+ Kf8 37. Qh6+ Ke7 38. Qg5+ 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "3"]
[White "Tatai, Stefano"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[PlyCount "23"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c3 d5 5. Nxe5 dxe4 6. d4 exd3 7. Qf3 Be6 8.
Nxc6 Nxc6 9. O-O Qd5 10. Qxd5 Bxd5 11. Re1+ Be6 12. Bxd3 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Quinones, Oscar Carillo"]
[Result "1/2-1/2"]
[ECO "D40"]
[PlyCount "61"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. e3 d5 5. Nf3 Nc6 6. Bd3 cxd4 7. exd4 dxc4 8.
Bxc4 Be7 9. O-O O-O 10. Re1 b6 11. a3 Bb7 12. Qd3 Rc8 13. Bf4 Na5 14. Ba2 Nd5
15. Bb1 g6 16. Bh6 Re8 17. Ne4 Nf6 18. Ned2 Bd5 19. Ne5 Nd7 20. Ng4 Nc4 21.
Nxc4 Bxc4 22. Qd2 Bd5 23. Bd3 Nf6 24. Ne5 Bb7 25. Qf4 Qd5 26. Bf1 Rc2 27. Bg5
Kg7 28. Bh6+ Kg8 29. Bg5 Kg7 30. Bh6+ Kg8 31. Bg5 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "5"]
[White "Rodriguez Cespedes, Amador"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "D59"]
[PlyCount "64"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. Nf3 O-O 6. e3 h6 7. Bh4 b6 8. cxd5
Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6 12. Qa4 c5 13. Qa3 Rc8 14. Bb5 Qb7
15. dxc5 bxc5 16. Rxc5 Rxc5 17. Qxc5 Na6 18. Bxa6 Qxa6 19. Qa3 Qc4 20. Kd2 Qg4
21. Rg1 d4 22. exd4 Bd5 23. h3 Qg6 24. Qc3 Rb8 25. b3 Qa6 26. Qb2 Qa5+ 27. Kd1
Rd8 28. Ne1 Be4 29. f3 Qc5 30. Nc2 Bxc2+ 31. Kc1 Qf5 32. g4 Qxf3 0-1

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Jimenez Zerquera, Eleazar"]
[Result "1/2-1/2"]
[ECO "A38"]
[PlyCount "33"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Bg7 6. Bg2 O-O 7. O-O c5 8.
Nxd5 Qxd5 9. d3 Nc6 10. Be3 Qd6 11. Qd2 Bd7 12. Rfc1 b6 13. Bh6 Rac8 14. Rc4
Nd4 15. Nxd4 cxd4 16. Bxg7 Kxg7 17. Rac1 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "7"]
[White "Garcia, Wilfredo"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E91"]
[PlyCount "87"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 d6 6. Be2 Bg4 7. O-O Nfd7 8. Be3
e5 9. d5 Bxf3 10. Bxf3 a5 11. a3 Na6 12. Rb1 f5 13. b4 axb4 14. axb4 Qh4 15.
Bd2 Rf7 16. g3 Qh3 17. exf5 Qxf5 18. Bg4 Qd3 19. Be6 Qxc4 20. Qf3 Raf8 21. Ne4
h6 22. Qg4 Kh8 23. Qxg6 Rf6 24. Nxf6 Rxf6 25. Qh5 Nf8 26. Bg5 Rxe6 27. dxe6
Qxe6 28. Be3 Nd7 29. b5 Nac5 30. Ra1 Kh7 31. Bxc5 Nxc5 32. Ra8 Ne4 33. Rc1 Nc5
34. Re8 Qg6 35. Qxg6+ Kxg6 36. Re7 e4 37. Rxc5 dxc5 38. Rxc7 Bd4 39. Rxb7 Kf5
40. Rc7 Ke6 41. b6 e3 42. fxe3 Bxe3+ 43. Kg2 Kd6 44. Rc8 1-0

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "8"]
[White "Caro, Alberto N"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D60"]
[PlyCount "40"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Nbd7 8. Bd3
c6 9. O-O dxc4 10. Bxc4 Nd5 11. Bxe7 Qxe7 12. Ne4 N5f6 13. Ng3 c5 14. Qe2 Rd8
15. Rfd1 cxd4 16. exd4 Nb6 17. Bb3 Nbd5 18. Ne5 Bd7 19. Rac1 Rac8 20. Ne4 Be8
1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Barreras, Alberto"]
[Result "0-1"]
[ECO "D77"]
[PlyCount "82"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. Nf3 g6 2. g3 Bg7 3. d4 Nf6 4. Bg2 O-O 5. O-O d5 6. c4 dxc4 7. Na3 c3 8. bxc3
c5 9. Nc4 Nc6 10. Nfe5 Nxe5 11. Nxe5 Nd5 12. Qb3 Be6 13. Qxb7 Nxc3 14. Nc6
Nxe2+ 15. Kh1 Qd7 16. Nxe7+ Kh8 17. Qxd7 Bxd7 18. Bxa8 Rxa8 19. Bf4 Nxf4 20.
gxf4 Bf6 21. Rfe1 Re8 22. Nd5 Rxe1+ 23. Rxe1 Bc6 24. Kg1 Bxd5 25. dxc5 Kg7 26.
Re8 a5 27. a3 a4 28. Rc8 Be7 29. c6 Be6 30. Ra8 Bxa3 31. Rxa4 Bd6 32. Kf1 Kf6
33. Ke2 Ke7 34. Ra7+ Kd8 35. Kd3 Bxf4 36. h4 Bc7 37. Ra6 Ke7 38. Kc3 Kd6 39.
Kb4 Bd5 40. Kb5 Bf3 41. Kb4 Bxc6 0-1

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "10"]
[White "Diaz, Joaquin Carlos"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C60"]
[PlyCount "79"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c4 g6 5. d4 exd4 6. Nxd4 Bg7 7. Be3 O-O 8.
O-O d6 9. h3 f5 10. exf5 Nxf5 11. Nxf5 Bxf5 12. Nc3 Qh4 13. Qd5+ Kh8 14. Bxc6
bxc6 15. Qxc6 Bd3 16. Rfd1 Qxc4 17. Qxc4 Bxc4 18. Bd4 Rae8 19. Bxa7 Bxc3 20.
bxc3 Ra8 21. Bd4+ Kg8 22. a3 Ra6 23. Rd2 Rfa8 24. Re1 c5 25. Be3 Kf7 26. a4 h5
27. a5 Rc6 28. Rb2 Rc7 29. Rb6 Rxa5 30. Rxd6 Ra6 31. Rd8 Ra3 32. Bh6 Kf6 33.
Re3 Ra1+ 34. Kh2 Be6 35. Rd6 Re7 36. Rf3+ Ke5 37. Bf4+ Ke4 38. Bg5 Re8 39. Re3+
Kf5 40. f4 1-0

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Keene, Raymond"]
[Result "1/2-1/2"]
[ECO "E43"]
[PlyCount "62"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. Nf3 b6 3. c4 Bb7 4. e3 e6 5. Nc3 Bb4 6. Bd3 O-O 7. O-O c5 8. Bd2
Bxc3 9. Bxc3 Ne4 10. Bxe4 Bxe4 11. dxc5 bxc5 12. Qd6 Bxf3 13. Qg3 f6 14. Qxf3
Nc6 15. Rad1 Qc7 16. Qg3 Qxg3 17. hxg3 Rfd8 18. Rd6 Kf7 19. Rfd1 Ke7 20. g4 a5
21. a4 Ra7 22. g5 Rb8 23. gxf6+ gxf6 24. f4 Nb4 25. R6d2 Na2 26. Kf2 Nxc3 27.
bxc3 Rab7 28. Rh1 Rh8 29. g4 Rb3 30. Rhd1 Rd8 31. Rh1 Rh8 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "12"]
[White "Boudy Bueno, Julio Leonardo"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D79"]
[PlyCount "88"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 c6 5. O-O O-O 6. Nc3 d5 7. cxd5 cxd5 8. d4
b6 9. Bf4 Bb7 10. Rc1 Nc6 11. Ne5 Rc8 12. Qa4 a6 13. Rfd1 Na5 14. b3 e6 15. Qb4
Nc6 16. Nxc6 Bxc6 17. Na4 b5 18. Nc5 a5 19. Qe1 b4 20. a3 bxa3 21. Ra1 Ne4 22.
Rxa3 Ra8 23. Nxe4 dxe4 24. Rc1 Qb6 25. Bd6 Rfd8 26. Bc5 Qb7 27. e3 Bd5 28. Rxa5
Qxb3 29. Rca1 h5 30. h4 Rdc8 31. Rxa8 Rxa8 32. Rxa8+ Bxa8 33. Qa5 Qb1+ 34. Kh2
Bd5 35. Bh3 Qa2 36. Qxa2 Bxa2 37. g4 hxg4 38. Bxg4 f5 39. Be2 Kf7 40. Bd6 e5
41. dxe5 Ke6 42. Bb5 Bxe5+ 43. Bxe5 Kxe5 44. Kg3 Bb3 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Lebredo Zarragoitia, Gerardo"]
[Result "1/2-1/2"]
[ECO "E61"]
[PlyCount "93"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. d4 Nf6 2. Nf3 c5 3. e3 g6 4. c4 Bg7 5. Nc3 O-O 6. d5 d6 7. Be2 e6 8. O-O
exd5 9. cxd5 a6 10. a4 Bg4 11. Nd2 Bxe2 12. Qxe2 Nbd7 13. Rb1 Rc8 14. b3 Nb6
15. Qd3 Ng4 16. Nc4 Nxc4 17. Qxc4 f5 18. Ne2 Qd7 19. Nf4 Rfe8 20. Ne6 Bh8 21.
f3 Ne5 22. Qc2 b5 23. axb5 axb5 24. e4 Nc6 25. Bb2 Bxb2 26. Qxb2 Nd8 27. exf5
gxf5 28. Nf4 Qg7 29. Qxg7+ Kxg7 30. Rfe1 Rxe1+ 31. Rxe1 Kf7 32. Kf2 Ra8 33. Ne6
Nxe6 34. Rxe6 Ra3 35. Rxd6 Rxb3 36. Rc6 c4 37. Kg3 c3 38. Kf4 Rb4+ 39. Ke3 Rc4
40. Rxc4 bxc4 41. g4 fxg4 42. fxg4 Kf6 43. h4 Ke5 44. g5 Kxd5 45. h5 Ke6 46.
Ke2 Kf5 47. g6 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "14"]
[White "Campos Lopez, Mario"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C60"]
[PlyCount "117"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8.
exd5 Nxd5 9. Re1+ Be6 10. Ne5 O-O 11. Bxc6 bxc6 12. Nd2 Ne7 13. Ndf3 Bd5 14. b3
Nf5 15. Ba3 Re8 16. Bc5 a5 17. Qd3 a4 18. b4 Nd6 19. a3 Nb5 20. Rad1 f6 21. Nc4
Qd7 22. h3 Bh6 23. Nfd2 Bxd2 24. Nxd2 Rxe1+ 25. Rxe1 Re8 26. Re3 Re6 27. Qc2
Qe8 28. Rxe6 Qxe6 29. Qxa4 Qe1+ 30. Nf1 Nd6 31. Bxd6 cxd6 32. b5 cxb5 33. Qxb5
Qe6 34. Ne3 Be4 35. a4 f5 36. Qc4 Qxc4 37. Nxc4 Bc6 38. a5 Kf7 39. a6 Ke7 40.
d5 Bxd5 41. Nb6 Bc6 42. a7 d5 43. a8=Q Bxa8 44. Nxa8 Kd6 45. Nb6 Kc5 46. Nd7+
Kc4 47. Kf1 Kd3 48. Ke1 Kc2 49. Ke2 g5 50. Ne5 d4 51. g3 Kc3 52. Kd1 h5 53. Nf7
g4 54. h4 d3 55. Nh6 Kd4 56. Nxf5+ Ke4 57. Ng7 Kf3 58. Nxh5 Kxf2 59. Kd2 1-0

[Event "Capablanca Memorial-B"]
[Site "Camaguey"]
[Date "1974.??.??"]
[Round "15"]
[White "De Greif, Boris"]
[Black "Vilela de Acuna, Jose Luis"]
[Result "1/2-1/2"]
[ECO "B52"]
[PlyCount "121"]
[EventDate "1974.03.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. c3 Nf6 7. d4 cxd4 8.
cxd4 Nxe4 9. d5 Nd8 10. Re1 Nc5 11. Be3 e6 12. Bxc5 dxc5 13. Nc3 Bd6 14. Ne4
Be7 15. d6 Bf6 16. Qd2 b6 17. Nxf6+ gxf6 18. Qf4 Rg8 19. Rad1 Nb7 20. Qxf6 Nxd6
21. Ng5 Qe7 22. Nxh7 Rd8 23. h4 Kd7 24. Qf4 Kc8 25. Nf6 Rg6 26. Ne4 Nf5 27.
Rxd8+ Qxd8 28. h5 Rg8 29. Ng3 Nxg3 30. fxg3 Qd4+ 31. Kh2 Rh8 32. Qxd4 cxd4 33.
g4 Kc7 34. Kg3 Kd6 35. Kf4 f6 36. Rh1 Kd5 37. h6 e5+ 38. Kf5 e4 39. Kf4 e3 40.
Kf3 Kc4 41. Ke2 a5 42. Rc1+ Kd5 43. Kd3 Rxh6 44. Rc4 Rh2 45. Rxd4+ Kc5 46. Rc4+
Kd5 47. Rc2 Rh4 48. Kxe3 Rxg4 49. Kf3 Ra4 50. b3 Rb4 51. g4 b5 52. Rc8 a4 53.
bxa4 Rxa4 54. Rf8 Ke5 55. Re8+ Kd4 56. Rb8 b4 57. Kf4 Kc3 58. Kf5 Rxa2 59. Kxf6
Rc2 60. Ke5 b3 61. g5 1/2-1/2

[Event "Nice ol (Men) fin-B"]
[Site "Nice"]
[Date "1974.06.16"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Estevez Morales, Guillermo"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2325"]
[BlackElo "2330"]
[PlyCount "0"]
[EventDate "1974.06.06"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Cuba"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "CUB"]

1-0

[Event "Nice ol (Men) fin-B"]
[Site "Nice"]
[Date "1974.06.18"]
[Round "4"]
[White "Kolbak, Jens"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E91"]
[BlackElo "2325"]
[PlyCount "40"]
[EventDate "1974.06.06"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Denmark"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "DEN"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 d6 6. Be2 Bg4 7. Be3 Nfd7 8. Rc1
e5 9. d5 Bxf3 10. Bxf3 a5 11. h4 f5 12. h5 Na6 13. hxg6 hxg6 14. g4 f4 15. Bd2
Ndc5 16. Ke2 Qg5 17. Na4 Rab8 18. Nxc5 Nxc5 19. b3 b6 20. Qc2 Kf7 1/2-1/2

[Event "Nice ol (Men) fin-B"]
[Site "Nice"]
[Date "1974.06.19"]
[Round "5"]
[White "Ott, Roland"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E82"]
[BlackElo "2325"]
[PlyCount "44"]
[EventDate "1974.06.06"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Switzerland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "SUI"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be3 d6 6. f3 b6 7. Bd3 Bb7 8. Nge2
c5 9. d5 e6 10. O-O exd5 11. exd5 Nbd7 12. b3 a6 13. a4 Re8 14. Qd2 Qe7 15. Bg5
Qf8 16. Rae1 h6 17. Bh4 Nh7 18. Bg3 Ne5 19. Bb1 Rad8 20. h3 Nd7 21. Ne4 Ndf6
22. Nxf6+ Nxf6 1/2-1/2

[Event "Nice ol (Men) fin-B"]
[Site "Nice"]
[Date "1974.06.22"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Wostin, Rik Hendrik"]
[Result "1-0"]
[ECO "E43"]
[WhiteElo "2325"]
[BlackElo "2265"]
[PlyCount "69"]
[EventDate "1974.06.06"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Belgium"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "BEL"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Nc3 Bb4 6. Bd3 O-O 7. O-O c5 8. Bd2
d5 9. cxd5 exd5 10. Rc1 Nc6 11. a3 Bxc3 12. Bxc3 Ne4 13. dxc5 bxc5 14. Bxe4
dxe4 15. Nd2 Qe7 16. Qa4 Rfe8 17. Nb3 Rac8 18. Rfd1 Ne5 19. Bxe5 Qxe5 20. Nxc5
Bc6 21. Qd4 Qg5 22. b4 h5 23. Qd6 h4 24. h3 Red8 25. Qf4 Qxf4 26. exf4 Kf8 27.
Kf1 Ke7 28. Ke2 Rxd1 29. Rxd1 f5 30. a4 a5 31. bxa5 Be8 32. Rc1 Bxa4 33. Ke3
Bb5 34. Nb3 Rxc1 35. Nxc1 1-0

[Event "Nice ol (Men) fin-B"]
[Site "Nice"]
[Date "1974.06.25"]
[Round "10"]
[White "Bessenay, Maurice"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "C60"]
[WhiteElo "2400"]
[BlackElo "2325"]
[PlyCount "50"]
[EventDate "1974.06.06"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "France"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8.
exd5 Nxd5 9. Re1+ Be6 10. Ne5 O-O 11. Bxc6 bxc6 12. Nc3 c5 13. Qf3 Nxc3 14.
bxc3 cxd4 15. Nc6 Qd7 16. Nxd4 Bd5 17. Qg3 Rfe8 18. Rxe8+ Rxe8 19. Be3 c5 20.
Nb3 Bxb3 21. axb3 Bxc3 22. Rc1 Bb2 23. Rf1 Bd4 24. Rd1 Qe6 25. h3 Qxb3 0-1

[Event "Nice ol (Men) fin-B"]
[Site "Nice"]
[Date "1974.06.26"]
[Round "11"]
[White "Santos, Luis M"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "C60"]
[WhiteElo "2270"]
[BlackElo "2325"]
[PlyCount "42"]
[EventDate "1974.06.06"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Portugal"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "POR"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. d3 Bg7 6. Nc3 O-O 7. Re1 d6 8. Bc4
Na5 9. Bb3 Nxb3 10. axb3 f5 11. Nd2 f4 12. f3 g5 13. Nf1 h5 14. Bd2 g4 15. Qe2
Ng6 16. Red1 Rf7 17. Be1 Qg5 18. Kh1 gxf3 19. gxf3 Bh3 20. Rd2 Bf6 21. Qf2 Rg7
0-1

[Event "Nice ol (Men) fin-B"]
[Site "Nice"]
[Date "1974.06.27"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Stoppel, Franz"]
[Result "1/2-1/2"]
[ECO "C07"]
[WhiteElo "2325"]
[PlyCount "32"]
[EventDate "1974.06.06"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Austria"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "AUT"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 cxd4 5. exd5 Qxd5 6. Bc4 Qd6 7. O-O Nf6 8.
Nb3 Nc6 9. Nbxd4 Nxd4 10. Qxd4 Qxd4 11. Nxd4 Bd7 12. Bg5 Ne4 13. Be3 Nd6 14.
Bb3 e5 15. Nf3 f6 16. Bc5 Bc6 1/2-1/2

[Event "Nice ol (Men) fin-B"]
[Site "Nice"]
[Date "1974.06.28"]
[Round "13"]
[White "Piasetski, Leon David"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[WhiteElo "2295"]
[BlackElo "2325"]
[PlyCount "46"]
[EventDate "1974.06.06"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Canada"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "CAN"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. d4 exd4 6. Nxd4 Bg7 7. Be3 O-O 8.
Nc3 d6 9. Re1 Bd7 10. Nxc6 bxc6 11. Ba4 Kh8 12. Qd2 Ng8 13. Rad1 Qb8 14. Bb3
Be6 15. Bd4 Bxb3 16. Bxg7+ Kxg7 17. axb3 f6 18. Re3 Qb6 19. h4 Rae8 20. h5 Re5
21. hxg6 hxg6 22. f4 Rh5 23. Ne2 Nh6 1/2-1/2

[Event "Nice ol (Men) fin-B"]
[Site "Nice"]
[Date "1974.06.29"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Young, Norman"]
[Result "1-0"]
[ECO "D94"]
[WhiteElo "2325"]
[PlyCount "81"]
[EventDate "1974.06.06"]
[EventType "team-tourn"]
[EventRounds "15"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "SCO"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. cxd5 Nxd5 6. e3 O-O 7. Bc4 Nb6 8.
Bb3 Na6 9. O-O c5 10. Qe2 e6 11. Rd1 cxd4 12. exd4 Nc7 13. Bg5 Bf6 14. h4 Nbd5
15. Ne4 Be7 16. Bh6 Re8 17. g3 f6 18. Rac1 b6 19. Nc3 Bf8 20. Bxf8 Kxf8 21. Qd2
Kg7 22. Nh2 h5 23. Re1 Bb7 24. Nf1 Qd7 25. Ne3 Rad8 26. Ncxd5 Nxd5 27. Ba4 Bc6
28. Nxd5 Bxa4 29. Rc7 exd5 30. Rec1 Rc8 31. Rxd7+ Bxd7 32. Rxc8 Rxc8 33. f3 Bf5
34. Qf4 Rc2 35. Qd6 Rxb2 36. Qe7+ Kg8 37. Qd8+ Kg7 38. Qxd5 Rd2 39. Qb7+ Kf8
40. Qb8+ Ke7 41. Qxa7+ 1-0

[Event "Nice ol (Men) qual-F"]
[Site "Nice"]
[Date "1974.06.09"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Pribyl, Josef"]
[Result "1/2-1/2"]
[ECO "A16"]
[WhiteElo "2325"]
[BlackElo "2455"]
[PlyCount "23"]
[EventDate "1974.06.07"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Czechoslovakia"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "CSR"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. cxd5 Nxd5 7. Nc3 Nb6 8.
d3 Nc6 9. Be3 h6 10. Qc1 Kh7 11. Rd1 e5 12. b4 1/2-1/2

[Event "Nice ol (Men) qual-F"]
[Site "Nice"]
[Date "1974.06.11"]
[Round "5"]
[White "Sursock, Sameer"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A00"]
[BlackElo "2325"]
[PlyCount "0"]
[EventDate "1974.06.07"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Lebanon"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "LBN"]
[BlackTeamCountry "COL"]

1/2-1/2

[Event "Nice ol (Men) qual-F"]
[Site "Nice"]
[Date "1974.06.15"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Lim, Kok Ann"]
[Result "1-0"]
[ECO "A43"]
[WhiteElo "2325"]
[BlackElo "2230"]
[PlyCount "85"]
[EventDate "1974.06.07"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "FRA"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Singapore"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "SIN"]

1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. d5 d6 5. Nf3 Bg4 6. Be2 Nd7 7. O-O Ngf6 8. Nd2
Bxe2 9. Qxe2 a6 10. a4 O-O 11. Nc4 Ne5 12. Nxe5 dxe5 13. a5 Rc8 14. Be3 Kh8 15.
f3 Nh5 16. Qc4 Qc7 17. Bd2 Qd6 18. Na4 e6 19. Nb6 Rc7 20. Be3 Nf4 21. Rfd1 Rd8
22. Bxf4 exf4 23. c3 e5 24. Ra4 f5 25. Qe2 Qf6 26. Nc4 Rcd7 27. Ra3 fxe4 28.
Qxe4 Qf5 29. Rb3 Qxe4 30. fxe4 Kg8 31. Rb6 Kf7 32. Ra1 Re8 33. Nd6+ Rxd6 34.
Rxd6 Ke7 35. Re6+ Kd7 36. Rxe8 Kxe8 37. Ra3 Kd7 38. Rb3 Kc7 39. Rb6 c4 40. d6+
Kc8 41. d7+ Kd8 42. Rxb7 Bf6 43. Ra7 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Minaya Molano, Juan M"]
[Result "0-1"]
[ECO "A42"]
[WhiteElo "2345"]
[BlackElo "2300"]
[PlyCount "78"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 g6 2. Nc3 Bg7 3. e4 d6 4. d4 Nd7 5. Nf3 e5 6. Be2 c6 7. O-O Nh6 8. dxe5
dxe5 9. Qd6 Qe7 10. Qxe7+ Kxe7 11. b3 f6 12. Ba3+ Ke8 13. Rad1 Bf8 14. Bxf8
Nxf8 15. Rd2 Ne6 16. Rfd1 Ke7 17. Na4 Nf7 18. c5 Rd8 19. Bc4 Rxd2 20. Rxd2 Nf4
21. Bxf7 Kxf7 22. g3 Ne6 23. b4 Ke7 24. h4 h5 25. Kg2 Rb8 26. Ne1 b5 27. cxb6
axb6 28. Nc2 Bd7 29. Nc3 b5 30. f3 Ra8 31. Kf2 Nd8 32. f4 Be6 33. fxe5 fxe5 34.
Ne1 Ra3 35. Rc2 Nf7 36. Nd3 Nd6 37. Nc5 Bg4 38. Kg1 Nc4 39. Kf2 Ra8 {time} 0-1

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "2"]
[White "Agudelo, Antonio"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A37"]
[WhiteElo "2300"]
[BlackElo "2345"]
[PlyCount "61"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 c5 2. c4 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nc3 e6 6. O-O Nge7 7. d3 d5 8. cxd5
exd5 9. Bd2 O-O 10. Qc1 b6 11. Bh6 Bb7 12. Bxg7 Kxg7 13. a3 d4 14. Ne4 Nd5 15.
Rb1 Qe7 16. Re1 Rad8 17. h4 h6 18. g4 f5 19. gxf5 Rxf5 20. Ng3 Rdf8 21. Nxf5+
Rxf5 22. e4 dxe3 23. fxe3 Ne5 24. Nxe5 Rxe5 25. e4 Qxh4 26. Rf1 Rg5 27. Rf2 Nc7
28. Qc3+ Kg8 29. Qf6 Rxg2+ 30. Kxg2 Qxf6 31. Rxf6 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Gutierrez Castillo, Jose Antonio"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2345"]
[BlackElo "2315"]
[PlyCount "113"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 c4 7. g3 f6 8. exf6 gxf6
9. Nh4 Bd7 10. Qh5+ Kd8 11. Bh3 Kc7 12. O-O Bd6 13. Nd2 Nge7 14. Rb1 Rag8 15.
Qd1 Ng6 16. Ndf3 Kb8 17. Re1 Nxh4 18. Nxh4 f5 19. Qf3 Qc7 20. Ng2 h5 21. Bf4 h4
22. Bxd6 Qxd6 23. Qf4 Qxf4 24. Nxf4 hxg3 25. fxg3 Rh6 26. Bg2 Kc7 27. Re3 Kd6
28. Rbe1 a5 29. h4 b5 30. Kf2 b4 31. axb4 axb4 32. Ra1 Rb8 33. Bf3 Rb5 34. Ra8
e5 35. dxe5+ Nxe5 36. Ra6+ Bc6 37. Ne2 bxc3 38. bxc3 Rb2 39. Ke1 Nxf3+ 40. Rxf3
Re6 41. Rf2 d4 42. cxd4 c3 43. Kd1 Rd2+ 44. Ke1 Kd7 45. Ra5 Rb2 46. Kd1 Rexe2
47. Rxe2 Bf3 48. Rae5 Rxe2 49. Rxe2 Kd6 50. Ke1 Kd5 51. Re3 Bg4 52. Rxc3 Kxd4
53. Ra3 Ke5 54. Ra4 Bh5 55. Kf2 Kf6 56. Ke3 Kg6 57. Ra6+ 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "4"]
[White "Henao, Raul Fernando"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A49"]
[WhiteElo "2270"]
[BlackElo "2345"]
[PlyCount "147"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. d4 e5 7. dxe5 Nfd7 8. O-O
Nc6 9. Qd2 Ndxe5 10. Nxe5 dxe5 11. Rd1 Bg4 12. Nc3 Qxd2 13. Rxd2 Rfd8 14. Rad1
Rxd2 15. Rxd2 Rd8 16. Nd5 Kh8 17. c4 Nb8 18. Rc2 c6 19. Ne3 Be6 20. b4 f5 21.
b5 e4 22. f3 cxb5 23. Bxg7+ Kxg7 24. cxb5 exf3 25. Bxf3 Rd7 26. Kf2 Rf7 27. Nd5
b6 28. Nf4 Kf6 29. h4 h6 30. Nxe6 Kxe6 31. Rc8 Nd7 32. Rc6+ Ke5 33. Rxg6 Nf6
34. Rxh6 Rd7 35. Rh8 Rd2 36. h5 Rd7 37. Ke3 Rc7 38. Kd3 Rg7 39. Ra8 Rxg3 40.
Rxa7 Nxh5 41. Rb7 Nf4+ 42. Ke3 Nd5+ 43. Kd2 Rg6 44. Kc2 Rd6 45. Rb8 Kd4 46. Kb3
Nf6 47. a4 Nd7 48. Re8 Ne5 49. Rf8 Nxf3 50. exf3 Ke5 51. Rc8 Rd3+ 52. Rc3 Rd8
53. Rc6 Rd3+ 54. Kb4 Rd4+ 55. Rc4 Rd1 56. Rc6 Rd4+ 57. Kb3 Rd3+ 58. Rc3 Rd8 59.
Re3+ Kf4 60. Re6 Rb8 61. Rf6 Ke5 62. Rf7 Rd8 63. a5 bxa5 64. Ka4 Rd1 65. b6
Ra1+ 66. Kb5 a4 67. Ra7 Rb1+ 68. Kc6 Rc1+ 69. Kd7 Rd1+ 70. Kc8 Rc1+ 71. Rc7 Rb1
72. b7 Kf4 73. Rc3 a3 74. Rxa3 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Garcia, Luis E"]
[Result "1-0"]
[ECO "A01"]
[WhiteElo "2345"]
[BlackElo "2360"]
[PlyCount "107"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. b3 Nf6 2. Bb2 e6 3. e3 c5 4. f4 Be7 5. Nf3 Qc7 6. Bd3 Nc6 7. O-O b6 8. Nc3
Bb7 9. a3 a6 10. Ne2 b5 11. Rc1 Qb6 12. Rb1 Na5 13. Nc1 Rc8 14. b4 cxb4 15.
axb4 Nc6 16. Bxf6 gxf6 17. c3 f5 18. Nb3 d6 19. Qe2 Bf6 20. Nbd4 Nxd4 21. exd4
Kf8 22. Ng5 Qc7 23. Rbe1 Qd7 24. Qh5 h6 25. Nf3 Qd8 26. Re3 Bg7 27. Nh4 Qf6 28.
Rg3 Bd5 29. Bxf5 exf5 30. Nxf5 Be4 31. Nxg7 Rg8 32. Qe2 Bb7 33. Nh5 Qf5 34.
Rxg8+ Kxg8 35. Qg4+ Qg6 36. f5 Qg5 37. h4 Qxg4 38. Nf6+ Kf8 39. Nxg4 Kg7 40.
Re1 h5 41. Ne3 Kf6 42. Rf1 Rg8 43. Rf4 Rh8 44. Kh2 a5 45. bxa5 Ra8 46. Nf1 Kg7
47. Ng3 Kh6 48. f6 Kg6 49. Nf5 Ra6 50. Ne7+ Kh6 51. d5 Rxa5 52. Rb4 Ba6 53. g4
hxg4 54. Rxg4 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "6"]
[White "Cuellar Gacharna, Miguel"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A81"]
[WhiteElo "2360"]
[BlackElo "2345"]
[PlyCount "122"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 f5 2. b3 Nf6 3. Bb2 g6 4. c4 Bg7 5. g3 O-O 6. Bg2 c5 7. O-O Nc6 8. e3 d6
9. d4 Ne4 10. Nc3 e6 11. Rc1 Qe7 12. d5 Nb4 13. dxe6 Bxe6 14. Qe2 Rad8 15. Rfd1
Nxc3 16. Bxc3 Bxc3 17. Rxc3 d5 18. a3 Nc6 19. cxd5 Rxd5 20. Rdc1 Rfd8 21. h4 h6
22. R3c2 Qd6 23. Ne1 Rd1 24. Rxc5 Rxc1 25. Rxc1 Qxa3 26. Rb1 Qb4 27. Qb2 Qe7
28. b4 Bd5 29. Bxd5+ Rxd5 30. Qa2 Qd7 31. b5 Ne7 32. Qxa7 Rxb5 33. Qa4 Rd5 34.
Qb3 Kf8 35. Qxb7 Qxb7 36. Rxb7 Rd1 37. Kf1 Nd5 38. Rb3 Rc1 39. Rb2 Nc3 40. Rb6
Kg7 41. Rc6 Na2 42. Rxc1 Nxc1 43. Nf3 Kf6 44. Ke1 Nd3+ 45. Ke2 Nc5 46. Nd2 Ke5
47. f3 Kd5 48. g4 fxg4 49. fxg4 Ke5 50. Nc4+ Kd5 51. Nb2 g5 52. h5 Nd7 53. Nd3
Ke4 54. Nf2+ Kd5 55. Kd3 Nc5+ 56. Kc3 Ne4+ 57. Nxe4 Kxe4 58. Kd2 Kf3 59. Kd3
Kxg4 60. Kd4 Kf3 61. e4 g4 0-1

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Sanchez, Luis Augusto"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2345"]
[BlackElo "2260"]
[PlyCount "46"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. d3 Nf6 7. Bg5 Qxe2+ 8.
Bxe2 Be7 9. Nc3 Bd7 10. O-O O-O 11. Rfe1 h6 12. Bd2 Nc6 13. d4 Rae8 14. a3 Bg4
15. Be3 Bd8 16. h3 Bd7 17. Rad1 a6 18. d5 Ne7 19. g4 g5 20. Bf1 Ng6 21. Bd3 Ne7
22. Bf1 Ng6 23. Bd3 Ne7 1/2-1/2

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "8"]
[White "Alzate, Javier"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C26"]
[WhiteElo "2320"]
[BlackElo "2345"]
[PlyCount "62"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 Nf6 2. d3 e5 3. Nc3 d5 4. Bg5 d4 5. Nd5 Nbd7 6. Nf3 c6 7. Nxf6+ Nxf6 8.
Qd2 Bd6 9. Be2 Qe7 10. O-O h6 11. Bh4 g5 12. Bg3 Nd7 13. c3 c5 14. a3 Nf8 15.
b4 dxc3 16. Qxc3 cxb4 17. axb4 Ng6 18. d4 Bxb4 19. Bb5+ Kf8 20. Qb2 Bd6 21.
dxe5 Bc7 22. Rac1 Be6 23. Bc4 Bb6 24. Nd4 Bxd4 25. Qxd4 Kg7 26. f4 gxf4 27.
Bxf4 Nxf4 28. Rxf4 Rac8 29. Rc3 Rxc4 30. Rxc4 Rd8 31. Qc3 Rd1+ 1/2-1/2

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Silva, Marco A"]
[Result "1/2-1/2"]
[ECO "C26"]
[WhiteElo "2345"]
[PlyCount "80"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 Nc6 5. Nge2 a6 6. d3 d6 7. Nd5 Bg4 8. c3
Nxd5 9. exd5 Qf6 10. O-O Ne7 11. Qa4+ Bd7 12. Qc2 h5 13. h4 Qg6 14. Qd2 Ba7 15.
d4 Bb5 16. Re1 O-O-O 17. b3 Bd3 18. Bb2 f6 19. Nf4 exf4 20. Rxe7 fxg3 21. fxg3
Bf5 22. Qf4 Rhe8 23. Rae1 Rxe7 24. Rxe7 Rd7 25. Re1 Kd8 26. c4 Bg4 27. Qe3 Qf7
28. b4 Re7 29. Qxe7+ Qxe7 30. Rxe7 Kxe7 31. c5 b6 32. c6 b5 33. Kf2 Bf5 34. Ke3
Bb1 35. a3 Kf7 36. Bf3 g6 37. Kd2 Kg7 38. Ke3 f5 39. Kf4 Kf6 40. Bc3 Bb6
1/2-1/2

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "10"]
[White "Velandia, Norberto"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "E15"]
[BlackElo "2345"]
[PlyCount "90"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb4+ 5. Bd2 Bxd2+ 6. Qxd2 Ba6 7. Qc2 O-O 8.
Bg2 c5 9. O-O Nc6 10. dxc5 bxc5 11. Rd1 Qa5 12. b3 Rac8 13. Nc3 d5 14. cxd5 Nd4
15. Nxd4 cxd4 16. b4 Qb6 17. dxe6 fxe6 18. Na4 Rxc2 19. Nxb6 axb6 20. Rxd4 Bxe2
21. Rd6 Rfc8 22. h3 Rc1+ 23. Rxc1 Rxc1+ 24. Kh2 b5 25. Rxe6 Bc4 26. Re5 Ra1 27.
Bc6 Rxa2 28. Kg1 Rb2 29. Bxb5 Rxb4 30. Bc6 Rb1+ 31. Kh2 Rb2 32. Kg2 Rd2 33. g4
Bd5+ 34. Bxd5+ Rxd5 35. Re6 Rd4 36. Kg3 Ne4+ 37. Kf3 Nd2+ 38. Kg2 Nc4 39. Re7
Kf8 40. Rc7 Ne5 41. Rc5 Nd3 42. Rf5+ Ke7 43. Kg3 Re4 44. Rg5 Kf6 45. Rf5+ Ke6 {
Here the game was adjourned, and White sealed the ambiguous move (in Spanish
descriptive notation) 46 T5C (Rg5 or Rb5), so the game was adjudicated to
Black.} 0-1

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Santos, German"]
[Result "1-0"]
[ECO "A01"]
[WhiteElo "2345"]
[PlyCount "164"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. b3 e5 2. Bb2 Nc6 3. e3 d5 4. Nf3 Bd6 5. Bb5 Bg4 6. h3 Bxf3 7. Qxf3 Nf6 8.
Bxc6+ bxc6 9. d3 O-O 10. Nd2 Qe7 11. a4 Rab8 12. O-O Qe6 13. e4 Nd7 14. g4 Rfe8
15. Rfd1 Nf8 16. Nf1 Ng6 17. Ne3 Nf4 18. Kh2 Rbd8 19. Nf5 d4 20. Rg1 Qc8 21.
Bc1 Qd7 22. Bd2 Ne6 23. g5 Rf8 24. Rg4 g6 25. Nh6+ Kh8 26. Rh4 Nf4 27. Ng4 f5
28. gxf6 Qe6 29. Bxf4 Rxf6 30. Nxf6 Qxf6 31. Rg4 exf4 32. Rag1 Re8 33. Rg5 Re6
34. Kh1 Qf8 35. Qg4 Qf7 36. f3 c5 37. h4 h5 38. Qh3 Kh7 39. Re1 c6 40. Reg1 Be7
41. R5g2 Bd8 42. Rh2 Ba5 43. Qf1 Bc3 44. Rg5 Bb4 45. Qe2 Kh6 46. Kg1 Kh7 47.
Kf1 Kh6 48. Qg2 Kh7 49. Qh3 Kh6 50. Ke2 Kh7 51. Qf1 Qf8 52. a5 a6 53. Qc1 Qd6
54. Kf1 Qf8 55. Kg1 Qf6 56. Qf1 Qf8 57. Qh3 Qf7 58. Re2 Ba3 59. Qf1 Bb4 60. Qc1
Qf8 61. e5 Bxa5 62. Re4 Bd8 63. Rg2 Kg7 64. Qxf4 Qxf4 65. Rxf4 Rxe5 66. Kf1 Bc7
67. Re4 Kf6 68. Rxe5 Bxe5 69. Rg5 Bd6 70. Kg2 Kf7 71. Kh3 a5 72. f4 Be7 73. Re5
Bd6 74. Re4 Bc7 75. Kg3 Bd6 76. Kf3 Be7 77. Re5 Bd6 78. Re1 Be7 79. Rh1 Kf6 80.
Ke4 Ke6 81. Rg1 Kf6 82. Rf1 Kf7 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "12"]
[White "Cuartas, Carlos Enrique"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C44"]
[WhiteElo "2405"]
[BlackElo "2345"]
[PlyCount "77"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. d4 d5 4. Bb5 dxe4 5. Nxe5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8.
Bg5 Be7 9. Nxc6 bxc6 10. Bxf6 Bxf6 11. Nxe4 Qxd4 12. Qxd4 Bxd4 13. O-O-O O-O-O
14. c3 Be5 15. g3 Rxd1+ 16. Kxd1 f5 17. Ng5 Bf6 18. Nf3 Re8 19. Re1 Rxe1+ 20.
Nxe1 Kd7 21. Kd2 Kd6 22. Kd3 Kc5 23. Nc2 g6 24. a4 Kd5 25. Ne3+ Ke6 26. f4 Be7
27. Kc4 Kd7 28. Nc2 Bf8 29. Nd4 Bg7 30. Nf3 Kd6 31. b4 Bf6 32. a5 Kd7 33. a6
Kd6 34. Ng5 h6 35. Nf3 Kd7 36. Nh4 Bxh4 37. gxh4 Kd6 38. h3 c5 39. b5 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2345"]
[BlackElo "2360"]
[PlyCount "120"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. g3 f5 2. Bg2 Nf6 3. b3 e6 4. Bb2 Be7 5. Nf3 a5 6. a4 O-O 7. O-O Qe8 8. e3 d6
9. d4 Nc6 10. Nc3 Nd8 11. Nb5 Qd7 12. Qe2 Nf7 13. Rfd1 c6 14. Na3 Qc7 15. Rac1
Bd7 16. c4 Rad8 17. Qe1 b6 18. d5 e5 19. Nd2 Rde8 20. f4 Ng4 21. h3 Nf6 22. Kh2
exf4 23. gxf4 Nh5 24. Qf2 Bf6 25. Bxf6 Nxf6 26. Rg1 Re7 27. Bf3 Rfe8 28. Qg2
Nd8 29. dxc6 Bxc6 30. Nb5 Qd7 31. Bxc6 Nxc6 32. Nf1 Re6 33. Rd1 R8e7 34. Nc3
Nb4 35. Qd2 Qe8 36. Ng3 Rxe3 37. Rg2 Rd3 38. Qc1 Ree3 39. Rxd3 Nxd3 40. Qf1 Ne1
41. Re2 Nf3+ 42. Kg2 Nh4+ 43. Kh2 Nf3+ 44. Kg2 Nd4 45. Rxe3 Qxe3 46. Nb5 Ne6
47. Kh2 g6 48. Qe2 Qxe2+ 49. Nxe2 Ne4 50. Nbd4 N6c5 51. Kg2 Kf7 52. h4 Ke7 53.
Nc1 d5 54. cxd5 Kd6 55. Kf3 Kxd5 56. Ke3 Nd2 57. Nxf5 gxf5 58. Kxd2 Ke4 59. Kc3
Kxf4 60. Kd4 Kf3 0-1

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Munoz, Francisco"]
[Result "1/2-1/2"]
[ECO "A43"]
[WhiteElo "2345"]
[BlackElo "2280"]
[PlyCount "46"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 g6 2. d4 Bg7 3. Nf3 c5 4. d5 d6 5. Nc3 a6 6. a4 b6 7. Be2 Nf6 8. O-O Nbd7
9. h3 O-O 10. Nd2 Ne8 11. Nc4 Rb8 12. Bf4 Ne5 13. Qd2 f5 14. exf5 gxf5 15. Rfe1
b5 16. axb5 axb5 17. Nxe5 dxe5 18. Bg5 Nd6 19. Ra7 b4 20. Na4 Ne4 21. Qe3 Rb7
22. Rxb7 Bxb7 23. Nxc5 Nxg5 1/2-1/2

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "15"]
[White "Rodriguez, Jose ES"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A00"]
[BlackElo "2345"]
[PlyCount "0"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Rodriguez Gonzales, Jesus"]
[Result "0-1"]
[ECO "E60"]
[PlyCount "87"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. c4 O-O 5. g3 c5 6. Bg2 Nc6 7. O-O d6 8. d4
cxd4 9. Nxd4 Bd7 10. Nc3 Rc8 11. Nd5 Nxd5 12. Nxc6 bxc6 13. Bxg7 Kxg7 14. cxd5
c5 15. Qd2 Rb8 16. h4 f6 17. e4 Rb4 18. f4 Qb6 19. Kh2 Rd4 20. Qe3 Qb4 21. Rf2
a5 22. a3 Qb5 23. Bf1 Qb7 24. a4 e6 25. Bc4 Re8 26. Qf3 exd5 27. exd5 Bf5 28.
Qc3 Qa7 29. Re1 Rde4 30. Rxe4 Rxe4 31. Qd2 Qb6 32. Re2 Qb4 33. Qxb4 Rxe2+ 34.
Bxe2 cxb4 35. Bc4 Be4 36. Kg1 g5 37. Kf2 gxf4 38. gxf4 Kh6 39. Ke3 Bc2 40. Kd2
Bf5 41. Be2 Be4 42. Bc4 f5 43. Ke3 Kh5 44. Kd4 0-1

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "2"]
[White "Garcia, Gilberto"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E82"]
[PlyCount "93"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be3 d6 6. f3 b6 7. Qd2 c5 8. d5 a6
9. a4 e6 10. Bd3 exd5 11. cxd5 Nbd7 12. Nh3 Ne5 13. Be2 Bxh3 14. gxh3 b5 15.
axb5 axb5 16. Rxa8 Qxa8 17. Nxb5 Rb8 18. O-O Qa2 19. b4 Qb3 20. Nxd6 Qxb4 21.
Rd1 Bf8 22. Qxb4 cxb4 23. Nb5 Nxf3+ 24. Bxf3 Rxb5 25. e5 Nd7 26. Be2 Rb8 27.
Bf4 g5 28. Bg3 Bc5+ 29. Kf1 Ra8 30. e6 fxe6 31. dxe6 Nb6 32. Bd6 Bxd6 33. Rxd6
Rf8+ 34. Kg2 Nc8 35. Rd7 Nb6 36. Rb7 Nd5 37. e7 Nf4+ 38. Kf3 Re8 39. Bb5 Kf7
40. Bxe8+ Kxe8 41. Kg4 Nd5 42. Kxg5 Kf7 43. Kh6 Nxe7 44. Kxh7 Kf6 45. Rxb4 Kg5
46. Rb5+ Kh4 47. Rc5 1-0

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Durao, Joaquim"]
[Result "1-0"]
[ECO "C26"]
[PlyCount "75"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. e4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 d6 5. Nf3 Nc6 6. d3 O-O 7. O-O Bd7 8. h3
Nd4 9. Nxd4 Bxd4 10. Ne2 Bb6 11. Kh2 c6 12. f4 exf4 13. Nxf4 Be6 14. Bd2 Qe7
15. Bc3 Be3 16. Qf3 Bxf4 17. gxf4 Rad8 18. Rg1 Ne8 19. f5 Bc8 20. Qg3 f6 21.
Bf3 d5 22. Rg2 Qc7 23. Qxc7 Nxc7 24. Rag1 Rd7 25. e5 fxe5 26. Bxe5 Ne8 27. f6
g6 28. Bg4 Rd8 29. Rf2 Kf7 30. Re1 Bxg4 31. hxg4 Nd6 32. Bxd6 Rxd6 33. Re7+ Kg8
34. Rg7+ Kh8 35. g5 Rb8 36. Re2 h6 37. Ree7 hxg5 38. Rh7+ 1-0

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "4"]
[White "Wade, Robert Graham"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D55"]
[PlyCount "50"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 Be7 5. e3 O-O 6. Nc3 h6 7. Bxf6 Bxf6 8. Qb3
c6 9. Rd1 Nd7 10. Be2 b6 11. e4 dxc4 12. Bxc4 b5 13. Be2 Qa5 14. O-O e5 15. d5
b4 16. Nb1 Bb7 17. d6 Rad8 18. Nbd2 Nb6 19. Nc4 Nxc4 20. Bxc4 Rd7 21. Rd3 c5
22. Bd5 Ba6 23. Bc4 Bb7 24. Bd5 Ba6 25. Bc4 Bb7 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "5"]
[White "Camps Galceran, Pere"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A05"]
[PlyCount "118"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 Nc6 6. e4 e5 7. Nbd2 d6 8. c3
Re8 9. a4 a5 10. Nc4 Bg4 11. h3 Be6 12. Ne3 Bd7 13. Nh4 Qe7 14. Kh2 Kh8 15. Bf3
Nd8 16. Bg4 Ne6 17. Nd5 Qd8 18. Nxf6 Bxf6 19. Ng2 Bg7 20. f4 exf4 21. gxf4 Nc5
22. f5 g5 23. Be3 b6 24. Bd4 Be5+ 25. Bxe5+ dxe5 26. Bh5 Rf8 27. Rf3 f6 28. Rg3
Be8 29. Bxe8 Qxe8 30. h4 h6 31. Qe2 Kg7 32. Ne3 Nxa4 33. Nd5 Rc8 34. d4 c6 35.
Nxf6 Kxf6 36. Rxa4 c5 37. dxe5+ Qxe5 38. Qh5 Rh8 39. Qg6+ Ke7 40. h5 Rcd8 41.
f6+ Qxf6 42. Qxf6+ Kxf6 43. Rf3+ Ke6 44. Ra1 Rhf8 45. Raf1 Rxf3 46. Rxf3 Ke5
47. Rf5+ Ke6 48. Kg3 Rd3+ 49. Kg2 Re3 50. Rf8 Rxe4 51. Rb8 Re2+ 52. Kg3 Rxb2
53. Rh8 a4 54. Rxh6+ Kf7 55. Rh7+ Kf6 56. Rb7 Re2 57. h6 Kg6 58. Rxb6+ Kh7 59.
Kg4 Rc2 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Gutierrez Castillo, Jose Antonio"]
[Result "1/2-1/2"]
[ECO "D79"]
[PlyCount "33"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 c6 7. cxd5 cxd5 8. Nc3
Nc6 9. Ne5 e6 10. Bf4 Nxe5 11. Bxe5 Bd7 12. Qb3 Bc6 13. Rac1 Qa5 14. Rfd1 Rfc8
15. e3 b5 16. a3 Ne8 17. Bf4 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "7"]
[White "Cobo Arteaga, Eldis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E94"]
[PlyCount "80"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. Be2 e5 7. O-O Qe7 8. Bg5
Nbd7 9. Nd5 Qd8 10. dxe5 dxe5 11. Qc2 c6 12. Nxf6+ Bxf6 13. Be3 Qe7 14. c5 Rd8
15. Rfd1 Nf8 16. Rxd8 Qxd8 17. Rd1 Qe7 18. h3 Be6 19. Qa4 a6 20. Qa5 Rd8 21.
Rxd8 Qxd8 22. Qxd8 Bxd8 23. a3 Nd7 24. Nd2 Bc7 25. Nc4 f6 26. Kf1 Kf7 27. Ke1
h5 28. Kd2 Ke7 29. Kc3 Bxc4 30. Kxc4 Nf8 31. h4 Ne6 32. b4 Kf7 33. a4 Ke7 34.
g3 Kd7 35. Bd1 Ke7 36. b5 axb5+ 37. axb5 Ba5 38. Ba4 Kd7 39. Bd1 Ke7 40. b6 Be1
1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Cuartas, Carlos Enrique"]
[Result "1/2-1/2"]
[ECO "B06"]
[PlyCount "90"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. e4 Nc6 2. Nc3 g6 3. g3 Bg7 4. Bg2 d6 5. Nge2 f5 6. d3 Nf6 7. Bg5 Ng4 8. exf5
Bxf5 9. h3 Nge5 10. Qd2 h5 11. Be3 Qd7 12. f4 Nf7 13. O-O-O Be6 14. Nd5 Bxd5
15. Bxd5 e6 16. Bf3 d5 17. g4 hxg4 18. hxg4 O-O-O 19. Ng3 Nd4 20. Bxd4 Bxd4 21.
c3 Bg7 22. d4 Nd6 23. Be2 Qf7 24. Bd3 Rh6 25. Rxh6 Bxh6 26. g5 Bg7 27. Rh1 Rh8
28. Rxh8+ Bxh8 29. Qe3 Kd7 30. Qf3 b6 31. b4 Ke7 32. Kb1 Qg7 33. Qh1 c5 34. Ne2
c4 35. Bc2 Kf7 36. a4 Kg8 37. Qh3 Qf7 38. Kc1 Bg7 39. Kd1 Qe8 40. Ke1 Kf7 41.
Qh1 a5 42. bxa5 bxa5 43. Kf2 Qb8 44. Qb1 Qxb1 45. Bxb1 Nc8 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "9"]
[White "Rodriguez Cespedes, Amador"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C70"]
[PlyCount "63"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c3 a6 5. Ba4 b5 6. Bb3 d5 7. d4 dxe4 8. Ng5
Nd5 9. dxe5 Be6 10. Nxe6 fxe6 11. Qg4 Qd7 12. Qxe4 Bc5 13. O-O O-O 14. Nd2 Rf5
15. Nf3 Raf8 16. Bc2 g6 17. Qe2 Nf4 18. Bxf4 Rxf4 19. Be4 Ne7 20. Rad1 Nd5 21.
g3 R4f7 22. Bxd5 exd5 23. e6 Re7 24. exd7 Rxe2 25. Rxd5 Bd6 26. Nd4 Re7 27.
d8=Q Rxd8 28. Nc6 Rde8 29. Nxe7+ Rxe7 30. Rfd1 Re6 31. Kf1 Kf7 32. Re1 1-0

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Fernandez, Juan C"]
[Result "1/2-1/2"]
[ECO "D42"]
[PlyCount "36"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Be7 7. Bd3 Nc6 8. O-O
O-O 9. a3 g6 10. Qe2 Bf6 11. Nxd5 Qxd5 12. e4 Qh5 13. dxc5 Qxc5 14. Be3 Qe7 15.
Rac1 Rd8 16. Rfd1 Nd4 17. Nxd4 Bxd4 18. Bxd4 Rxd4 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "11"]
[White "Boudy Bueno, Julio Leonardo"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E91"]
[PlyCount "79"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be2 d6 6. Nf3 Bg4 7. O-O Nfd7 8. Be3
Nc6 9. d5 Bxf3 10. Bxf3 Na5 11. Be2 c5 12. Rc1 a6 13. f4 Qc7 14. Kh1 Rfb8 15.
a3 b5 16. cxb5 Bxc3 17. Rxc3 axb5 18. b4 Nc4 19. Bc1 cxb4 20. axb4 Ra1 21. Qb3
Rba8 22. Bxc4 bxc4 23. Rxc4 Qb7 24. Qc3 Qb5 25. Rg1 Nf6 26. h3 Nd7 27. Rc8+
Rxc8 28. Qxc8+ Nf8 29. Qc3 Ra2 30. Bb2 f6 31. e5 Qe2 32. exf6 Qxb2 33. Qxb2
Rxb2 34. fxe7 Kf7 35. Re1 Ne6 36. Rxe6 Ke8 37. Rxd6 Rxb4 38. Re6 Rxf4 39. d6
Rd4 40. Kg1 1-0

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Fraguela Gil, Jose Miguel"]
[Result "1/2-1/2"]
[ECO "B38"]
[PlyCount "48"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. e4 d6 7. Be2 O-O 8. Be3
Nc6 9. Qd2 Bd7 10. O-O Nxd4 11. Bxd4 Bc6 12. f3 Nd7 13. Be3 f5 14. exf5 Rxf5
15. Rae1 Nf8 16. f4 Qa5 17. Bg4 Rf7 18. Rf2 a6 19. Ref1 b5 20. f5 b4 21. Nd5
gxf5 22. Rxf5 Bxd5 23. cxd5 Rxf5 24. Rxf5 Qxa2 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "13"]
[White "Soler, Alberto"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B15"]
[PlyCount "119"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Nf3 d5 5. Be2 Bg4 6. Be3 Nf6 7. e5 Nfd7 8. O-O
O-O 9. Ng5 Bxe2 10. Nxe2 e6 11. f4 Qe7 12. g4 f6 13. exf6 Nxf6 14. Ng3 Nbd7 15.
Qe2 Rae8 16. Rae1 h6 17. Nh3 Nh7 18. Qd3 Qh4 19. Nf2 Rf6 20. Kg2 Ndf8 21. Ne2
Rf7 22. Ng1 Qd8 23. Nf3 Bf6 24. h4 Bxh4 25. Nxh4 Qxh4 26. Rh1 Qd8 27. Rxh6 Nf6
28. Reh1 Rg7 29. g5 Ne4 30. Nxe4 dxe4 31. Qxe4 Qd5 32. Kf3 Qxa2 33. b3 Qa5 34.
c4 Qf5 35. Qxf5 exf5 36. Rh8+ Kf7 37. d5 cxd5 38. cxd5 Rd8 39. Bd4 Rxd5 40.
Bxg7 Kxg7 41. R8h3 Rb5 42. Ke2 Rb4 43. Re3 Kf7 44. Kf3 Ne6 45. Rh7+ Kg8 46. Rd7
Rb6 47. Rc3 Rc6 48. Rxc6 bxc6 49. Ke3 c5 50. Rxa7 Kf8 51. Rb7 Ke8 52. Ra7 Kf8
53. Kd3 Nxf4+ 54. Kc4 Ne6 55. Kd5 Nxg5 56. Kxc5 Ke8 57. b4 f4 58. b5 Ne6+ 59.
Kd6 Nd4 60. b6 1-0

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Fernandez, Ciro A"]
[Result "1/2-1/2"]
[ECO "A55"]
[PlyCount "48"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. c4 Nf6 2. Nc3 e5 3. g3 d6 4. Bg2 c6 5. d4 Nbd7 6. Nf3 Be7 7. O-O O-O 8. Qc2
Re8 9. b3 Bf8 10. e4 a5 11. h3 g6 12. Be3 exd4 13. Nxd4 Nc5 14. Rfe1 Nfd7 15.
Rad1 Bg7 16. Nde2 Qe7 17. Rd2 Nf6 18. f3 Be6 19. Red1 Rad8 20. e5 Bf5 21. Qc1
Qxe5 22. Bf4 Qe7 23. g4 Bc8 24. Rxd6 Ne6 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "15"]
[White "Serrano, Waldo"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E60"]
[PlyCount "23"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 c5 6. c4 Nc6 7. O-O d6 8. d4
cxd4 9. Nxd4 Bd7 10. Nc3 Qa5 11. h3 Rfc8 12. e3 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "16"]
[White "De Greif, Boris"]
[Black "Andres Mendez, Miguel"]
[Result "1/2-1/2"]
[ECO "B25"]
[PlyCount "25"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. g3 g6 2. Bg2 Bg7 3. f4 c5 4. e4 Nc6 5. Nf3 d6 6. d3 e6 7. O-O Nge7 8. Nc3
O-O 9. Be3 Nd4 10. Qd2 Rb8 11. Nd1 b6 12. c3 Nxf3+ 13. Bxf3 1/2-1/2

[Event "Capablanca Memorial-B"]
[Site "Cienfuegos"]
[Date "1975.??.??"]
[Round "17"]
[White "Garcia, Wilfredo"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E19"]
[PlyCount "21"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 Ne4 7. Qc2 Nxc3 8.
Qxc3 O-O 9. O-O f5 10. b3 Bf6 11. Bb2 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "2345"]
[BlackElo "2360"]
[PlyCount "111"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. Nf3 Nc6 2. g3 Nf6 3. Bg2 e5 4. d3 Bc5 5. e4 d5 6. exd5 Nxd5 7. O-O O-O 8.
Nc3 Bg4 9. h3 Nxc3 10. bxc3 Bh5 11. Qe1 Re8 12. Qe4 Qd7 13. Nh4 Bb6 14. g4 Bg6
15. Nxg6 hxg6 16. Bg5 Rab8 17. Rab1 Qe6 18. Qd5 Qxd5 19. Bxd5 Ne7 20. Bxe7 Rxe7
21. Kg2 c6 22. Bb3 Ba5 23. f4 Bxc3 24. fxe5 Rf8 25. e6 fxe6 26. Rxf8+ Kxf8 27.
Rf1+ Ke8 28. Rf4 g5 29. Re4 Kd7 30. Rc4 Bf6 31. a4 Kd6 32. Re4 c5 33. Re1 Be5
34. Rf1 Bf6 35. Re1 Be5 36. Rf1 a6 37. Bc4 Bf4 38. h4 Kc6 39. hxg5 Bxg5 40. Re1
Kd6 41. Rb1 Bd2 42. Rh1 Ke5 43. Rh8 Kd4 44. Kf3 Ba5 45. Rf8 Bc7 46. g5 Kc3 47.
Bb3 b5 48. axb5 axb5 49. g6 c4 50. dxc4 bxc4 51. Ba4 Kb4 52. Re8 Rxe8 53. Bxe8
Kc3 54. Bb5 Kd4 55. Bd7 Kd5 56. Bc8 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "2"]
[White "Rubinetti, Jorge Alberto"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[WhiteElo "2440"]
[BlackElo "2345"]
[PlyCount "23"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c3 d5 5. Nxe5 dxe4 6. d4 exd3 7. Qf3 Be6 8.
O-O Qd5 9. Qxd5 Bxd5 10. Nxc6 Nxc6 11. Re1+ Be6 12. Bxd3 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Rossetto, Hector"]
[Result "1/2-1/2"]
[ECO "C05"]
[WhiteElo "2345"]
[BlackElo "2430"]
[PlyCount "90"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. Bd3 c5 5. e5 Ng8 6. c3 Qb6 7. Ne2 Bd7 8. O-O
Nc6 9. Nf3 a6 10. dxc5 Bxc5 11. b4 Be7 12. Re1 h5 13. Rb1 Qc7 14. Ned4 g6 15.
h4 Nh6 16. Bxh6 Rxh6 17. Qd2 Rh8 18. g3 Kf8 19. Qf4 Kg7 20. Ng5 Raf8 21. Qxf7+
Rxf7 22. Ngxe6+ Bxe6 23. Nxe6+ Kh6 24. Nxc7 d4 25. Nd5 dxc3 26. e6 Rg7 27. Nxc3
Bxb4 28. Rec1 Ba3 29. Re1 Bb4 30. Rbc1 Re8 31. Re4 Rd8 32. Bc4 Rd2 33. Nd5 Bc5
34. Re2 Ba3 35. Rxd2 Bxc1 36. Rd1 Ba3 37. f4 Ne7 38. Nxe7 Rxe7 39. Rd7 Kg7 40.
Rxe7+ Bxe7 41. a4 Kf6 42. Kg2 b5 43. axb5 axb5 44. Bb3 b4 45. Kf3 Bc5 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "4"]
[White "Castro, German"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "2200"]
[BlackElo "2345"]
[PlyCount "104"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 g6 2. Nf3 Bg7 3. Bc4 c6 4. a4 d5 5. exd5 cxd5 6. Bb5+ Nc6 7. d4 Bg4 8. c3
Nf6 9. Nbd2 O-O 10. Bxc6 bxc6 11. h3 Bc8 12. O-O Nd7 13. Re1 Re8 14. Nb3 Qb6
15. Bf4 Ba6 16. Qc2 Rac8 17. Ra3 Bf8 18. Nc1 e5 19. Rb3 Qa5 20. dxe5 Qxa4 21.
Qd2 Bc4 22. e6 Rxe6 23. Rxe6 fxe6 24. Qe3 d4 25. Nxd4 Bxb3 26. Ndxb3 e5 27. Bg3
Re8 28. Qd3 Nf6 29. c4 Qb4 30. Kh2 Bg7 31. Na2 Qe7 32. Qe3 Rb8 33. Na5 Rxb2 34.
Nxc6 Qd6 35. Bxe5 Ng4+ 36. hxg4 Bxe5+ 37. Nxe5 Rxa2 38. f4 g5 39. c5 Qh6+ 40.
Kg3 gxf4+ 41. Qxf4 Ra3+ 42. Nf3 Qxf4+ 43. Kxf4 Rc3 44. g5 Rxc5 45. Ke4 a5 46.
Kd4 Rc2 47. g4 a4 48. Kd3 Rc7 49. Nd2 a3 50. Nb3 a2 51. Kd2 Rb7 52. Kc2 Rxb3
0-1

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Rodriguez Gonzales, Jesus"]
[Result "1/2-1/2"]
[ECO "B15"]
[WhiteElo "2345"]
[BlackElo "2390"]
[PlyCount "35"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 g6 2. e4 Bg7 3. Nf3 c6 4. Nc3 d5 5. h3 dxe4 6. Nxe4 Nd7 7. Bc4 Ngf6 8.
Nxf6+ Nxf6 9. O-O O-O 10. Re1 Bf5 11. a4 e6 12. c3 Nd5 13. Bg5 Qc7 14. Qd2 Rfe8
15. Bh6 Bh8 16. Bxd5 cxd5 17. Qf4 Qxf4 18. Bxf4 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "6"]
[White "Garces, Napoleon"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A42"]
[WhiteElo "2220"]
[BlackElo "2345"]
[PlyCount "110"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 Nc6 2. Nf3 g6 3. d4 d6 4. c4 Bg7 5. Nc3 Bg4 6. Be3 e5 7. d5 Nd4 8. Be2
Bxf3 9. gxf3 c5 10. f4 f5 11. fxe5 Bxe5 12. exf5 Nxf5 13. Qa4+ Kf8 14. O-O-O
Nxe3 15. fxe3 Bxc3 16. bxc3 Nf6 17. h4 Qe8 18. Qc2 Qxe3+ 19. Kb2 Re8 20. Rh2
Re5 21. Rf1 Ke7 22. Rhf2 Rf8 23. h5 Nd7 24. Rh2 Qg3 25. Bd3 Rxf1 26. Bxf1 Rxh5
27. Rxh5 gxh5 28. Qxh7+ Kd8 29. Qxh5 Qf2+ 30. Be2 Ne5 31. Kb3 Qf6 32. Qh7 Qe7
33. Qg8+ Kc7 34. Bg4 Qd8 35. Qh7+ Kb6 36. Be2 a6 37. a4 Ka7 38. Ka3 Qa5 39. Qc2
Qd8 40. Qh7 Qa5 41. Qc2 Qd8 42. Qb1 Qh8 43. Qe1 Qh6 44. Qd1 Qe3 45. Kb3 Kb6 46.
Kc2 Ka5 47. Kb3 Qe4 48. Qf1 Nd7 49. Bd3 Qe3 50. Qd1 Nb6 51. Bf1 Qe8 52. Qa1
Qxa4+ 53. Qxa4+ Nxa4 54. Bh3 Nb6 55. Be6 Na8 0-1

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Yepez Obando, Olavo"]
[Result "1/2-1/2"]
[ECO "B06"]
[WhiteElo "2345"]
[BlackElo "2370"]
[PlyCount "136"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 g6 2. d4 Bg7 3. h4 c5 4. dxc5 Qa5+ 5. Nc3 Nf6 6. Bd3 Na6 7. Kf1 h5 8. a3
Qxc5 9. Be3 Qc7 10. f3 d6 11. Bb5+ Bd7 12. Bxd7+ Qxd7 13. Nge2 O-O 14. Kf2 Rfc8
15. Qd2 Nc5 16. Rhg1 b5 17. Bd4 e5 18. Bxc5 Rxc5 19. b4 Rc4 20. Nd5 Nxd5 21.
Qxd5 Qc6 22. Qxc6 Rxc6 23. c3 Ra6 24. g4 hxg4 25. Rxg4 Rd8 26. h5 d5 27. hxg6
fxg6 28. Rd1 d4 29. cxd4 exd4 30. Rd3 Rc6 31. f4 Kf7 32. e5 Rc4 33. Rg1 Bf8 34.
Rb1 g5 35. Kf3 gxf4 36. Ke4 Bh6 37. Rf1 a6 38. Nxf4 Bxf4 39. Rxf4+ Ke7 40. Rf6
a5 41. bxa5 Ra8 42. Kf5 Rc3 43. Re6+ Kf7 44. Rxc3 dxc3 45. Rc6 Rxa5 46. Rc7+
Ke8 47. Rxc3 Ra6 48. Rh3 Kd7 49. Rh7+ Ke8 50. Rb7 Kf8 51. Rxb5 Rxa3 52. Kf6
Rf3+ 53. Ke6 Ra3 54. Rb8+ Kg7 55. Rd8 Ra6+ 56. Ke7 Ra5 57. e6 Ra6 58. Rc8 Ra7+
59. Kd6 Ra6+ 60. Kd7 Ra7+ 61. Rc7 Ra1 62. Ke7 Ra6 63. Rb7 Ra1 64. Kd6+ Kf8 65.
Kd7 Kg7 66. Rc7 Kf8 67. Rc6 Ra7+ 68. Kd6 Ra1 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "8"]
[White "Yepez, Trotzky"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C70"]
[WhiteElo "2215"]
[BlackElo "2345"]
[PlyCount "52"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c3 a6 5. Ba4 d6 6. d3 g6 7. Bg5 Bg7 8. O-O
h6 9. Be3 O-O 10. Ne1 f5 11. exf5 Nxf5 12. Nd2 Nxe3 13. fxe3 Rxf1+ 14. Nxf1 Qe7
15. Bb3+ Kh7 16. Ng3 Be6 17. Nf3 Nd8 18. Qc2 d5 19. Rf1 Nf7 20. e4 c6 21. Qf2
b5 22. Qb6 Qa7 23. Qxa7 Rxa7 24. Re1 Ng5 25. Nxg5+ hxg5 26. exd5 cxd5 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Idrovo, Franklin"]
[Result "1/2-1/2"]
[ECO "E12"]
[WhiteElo "2345"]
[BlackElo "2200"]
[PlyCount "164"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. c4 Bb7 5. a3 Be7 6. Nc3 d5 7. cxd5 exd5 8. Bb5+
c6 9. Bd3 O-O 10. O-O Nbd7 11. b4 a5 12. Rb1 axb4 13. axb4 Bd6 14. e4 dxe4 15.
Nxe4 Nxe4 16. Bxe4 Nf6 17. Bg5 h6 18. Bxf6 Qxf6 19. b5 Ra2 20. bxc6 Bc8 21.
Rxb6 Bg4 22. h3 Bh5 23. Rb5 Bxf3 24. Qxf3 Qxd4 25. Rd5 Qb4 26. Rb1 Rb2 27. Rdd1
Bc7 28. Rxb2 Qxb2 29. g3 Qe5 30. Bd5 Bb6 31. Kg2 Bc7 32. Rb1 Kh8 33. Qe4 Qd6
34. Rb3 g6 35. Rf3 Kg7 36. Qd4+ Qe5 37. Qxe5+ Bxe5 38. h4 h5 39. Kf1 f6 40. Ra3
Rc8 41. f4 Bd6 42. Ra7+ Rc7 43. Ra8 Re7 44. Rg8+ Kh7 45. Rd8 Bc7 46. Rc8 Bd6
47. Rd8 Bc7 48. Ra8 Bd6 49. Ra4 Kg7 50. Bf3 Kh6 51. Ra8 Kg7 52. Kg2 Kh7 53. Ra5
Kh6 54. Kf2 Bb4 55. Rb5 Bd6 56. Be2 Rc7 57. Bf3 Re7 58. Ra5 Bc7 59. Ra8 Bd6 60.
Ra6 Kg7 61. Kg2 Kh7 62. Ra2 Kg7 63. Bd5 Bc5 64. Rb2 Kh7 65. Rc2 Bb6 66. Kf1 Kg7
67. Rc4 Bc7 68. Ra4 Bd6 69. Be4 Kh6 70. Bd3 Kg7 71. Rd4 Bc7 72. Ba6 Bb6 73. Rc4
Bc7 74. Rd4 Bb6 75. Rd3 Rc7 76. Bb7 Bc5 77. Ke2 g5 78. Rd5 Be7 79. f5 Kf7 80.
Kf3 Bb4 81. Ke4 Be1 82. Rd3 Bf2 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Gutierrez Castillo, Jose Antonio"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2345"]
[BlackElo "2315"]
[PlyCount "0"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

0-1

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "11"]
[White "Verduga Zavala, Denis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E93"]
[WhiteElo "2250"]
[BlackElo "2345"]
[PlyCount "28"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]

1. c4 g6 2. Nc3 Bg7 3. d4 Nf6 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. d5 a5 8. Bg5 h6
9. Bh4 Na6 10. Nd2 Nc5 11. g4 Qd7 12. Rg1 Nh7 13. b3 Ng5 14. Bxg5 hxg5 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.10"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "2320"]
[BlackElo "2380"]
[PlyCount "110"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 Nc6 2. d4 e5 3. Nf3 exd4 4. c3 d5 5. exd5 Qxd5 6. cxd4 Bg4 7. Be2 O-O-O
8. Nc3 Qa5 9. Be3 Nf6 10. O-O Bc5 11. Nb5 Bxf3 12. gxf3 Nxd4 13. Nxd4 Qb6 14.
Qb3 Bxd4 15. Bc4 Qxb3 16. axb3 a6 17. Bxf7 Rhf8 18. Be6+ Kb8 19. f4 Bxb2 20.
Rad1 Ne4 21. Bf5 Nd2 22. Rxd2 Rxd2 23. Bxd2 Rxf5 24. Re1 Kc8 25. Kg2 a5 26. Kf3
Rd5 27. Re2 Bf6 28. Ke4 Rb5 29. Re3 b6 30. Rd3 Rc5 31. f5 Re5+ 32. Kf4 Re8 33.
Bc3 Bxc3 34. Rxc3 Re2 35. Rg3 Rxf2+ 36. Ke5 Re2+ 37. Kd5 Re7 38. Rh3 Rf7 39.
Ke6 Rf6+ 40. Ke5 h6 41. Rg3 Rf7 42. Rg6 Kd7 43. h4 Re7+ 44. Kd4 c6 45. h5 Rf7
46. Ke5 b5 47. Rg1 Re7+ 48. Kd4 Kc7 49. Rg6 Rd7+ 50. Kc3 Rf7 51. f6 Rxf6 52.
Rxg7+ Kd6 53. Kd4 Rf4+ 54. Ke3 Rb4 55. Rg6+ Kd5 0-1

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.11"]
[Round "2"]
[White "Panno, Oscar"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "2525"]
[BlackElo "2320"]
[PlyCount "79"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 g6 2. e4 Bg7 3. d4 d6 4. Be3 Nc6 5. f3 e5 6. Ne2 exd4 7. Nxd4 Nxd4 8.
Bxd4 Bxd4 9. Qxd4 Qh4+ 10. g3 Qf6 11. Qf2 Ne7 12. Nc3 Bd7 13. O-O-O a6 14. f4
Bc6 15. h4 h5 16. Bh3 b5 17. Nd5 Nxd5 18. cxd5 Bb7 19. Kb1 O-O 20. Rc1 Qe7 21.
Rhe1 Bc8 22. Bg2 f6 23. Qc2 Ra7 24. Ka1 Kh7 25. Qc3 Bg4 26. e5 fxe5 27. fxe5
dxe5 28. Rxe5 Qg7 29. Qe3 c5 30. dxc6 Raf7 31. Be4 Rf1 32. Rg5 R8f6 33. a3
Rxc1+ 34. Qxc1 Qc7 35. Qc3 Rf1+ 36. Ka2 Be6+ 37. Bd5 Qf7 38. Qb3 Bxd5 39. Rxd5
Qf2 40. Rd7+ 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.12"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "E60"]
[WhiteElo "2320"]
[BlackElo "2345"]
[PlyCount "151"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. e3 O-O 5. Be2 d6 6. d4 e5 7. c4 Nc6 8. O-O e4
9. Nfd2 Re8 10. Nc3 Bf5 11. a3 a5 12. Nb5 h5 13. Rc1 Bg4 14. Nc3 Bf5 15. Rc2
Rc8 16. Nb5 Ng4 17. g3 Qg5 18. h4 Qe7 19. Kg2 Bh6 20. Rc3 Kh7 21. Rh1 Rg8 22.
Nf1 g5 23. d5 Nce5 24. Nd4 Qf6 25. hxg5 Rxg5 26. Rc2 Rcg8 27. Rd2 Bd7 28. Qe1
Qg6 29. Rh4 c5 30. dxc6 bxc6 31. Bc1 c5 32. Nb5 Bf8 33. Nc3 Bc6 34. Nd5 Bxd5
35. Rxd5 Nf3 36. Bxf3 exf3+ 37. Kg1 Rxd5 38. cxd5 Be7 39. Rh1 h4 40. e4 Bf6 41.
Bf4 Re8 42. Nd2 Kg8 43. Nxf3 Rxe4 44. Qd2 hxg3 45. Bxg3 Ne5 46. Nxe5 Bxe5 47.
Qxa5 Kg7 48. Rh3 Rg4 49. Qe1 Qd3 50. Kh2 Bxg3+ 51. Rxg3 Rxg3 52. fxg3 Qxb3 53.
Qd2 f6 54. Kh3 Kg6 55. Kh4 Qf3 56. g4 c4 57. a4 Qd3 58. Qa5 Qe2 59. Kg3 Kg5 60.
Qc3 Qxg4+ 61. Kf2 Qf5+ 62. Qf3 Qc2+ 63. Kg3 Qb3 64. a5 f5 65. a6 f4+ 66. Kg2
Qa2+ 67. Kh3 Qxa6 68. Qg4+ Kf6 69. Qxf4+ Ke7 70. Qg5+ Kd7 71. Qg7+ Kc8 72. Kg4
Qb6 73. Kf3 Qc5 74. Ke4 Qf2 75. Qg8+ Kc7 76. Qg7+ 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.13"]
[Round "4"]
[White "Gutierrez Castillo, Jose Antonio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[WhiteElo "2320"]
[BlackElo "2320"]
[PlyCount "54"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8.
exd5 Nxd5 9. Re1+ Be6 10. Bg5 Qd6 11. Nbd2 O-O 12. Ne4 Qb4 13. Bxc6 bxc6 14.
Qc1 Rab8 15. b3 Rb6 16. Nc5 Bxd4 17. Nxd4 Qxd4 18. Re4 Qc3 19. Nxe6 Qxc1+ 20.
Rxc1 fxe6 21. Rxe6 Ra6 22. Bh6 Rd8 23. h3 Rxa2 24. Rexc6 Ra5 25. b4 Rb5 26. Ra6
Rxb4 27. Rxa7 Rdb8 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.14"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Castro Gonzales, Gonzalo"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2320"]
[PlyCount "89"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O d6 5. d3 Nc6 6. Nbd2 Nh6 7. c3 O-O 8. a4
Rb8 9. e4 Ng4 10. h3 Nge5 11. Ne1 f5 12. f4 Nf7 13. exf5 gxf5 14. Qh5 e6 15. g4
Ne7 16. Nef3 Ng6 17. Nc4 d5 18. Nce5 Ngxe5 19. fxe5 Nxe5 20. Nxe5 Bxe5 21. Bh6
Bg7 22. gxf5 Bxh6 23. Qxh6 exf5 24. Rae1 b5 25. Re3 Kh8 26. Rg3 Qe7 27. a5 Bb7
28. Kh2 Rbd8 29. Qf4 Qd6 30. d4 cxd4 31. Qxd4+ Qf6 32. Rxf5 Qxd4 33. Rxf8+ Rxf8
34. cxd4 Rf4 35. Rc3 Kg7 36. Kg3 Rf7 37. Rc5 Rd7 38. Rxb5 Kf6 39. Kf4 Ke6 40.
Rc5 Rg7 41. Bf3 Kd6 42. b4 Rf7+ 43. Ke3 Re7+ 44. Kf2 Rc7 45. Rxc7 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.15"]
[Round "6"]
[White "Martinez, Carlos Alejandro"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2340"]
[BlackElo "2320"]
[PlyCount "93"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. Nbd2 d5 5. c3 Bg4 6. h3 Bxf3 7. Qxf3 e6 8. Bd3
Nf6 9. O-O O-O 10. Re1 a5 11. exd5 cxd5 12. Nf1 Qb6 13. Qf4 Nc6 14. Qh4 Rfe8
15. Bg5 Nd7 16. Re2 a4 17. Rae1 Na5 18. Ne3 Rec8 19. Ng4 Nc4 20. Nh6+ Bxh6 21.
Bxh6 Qd8 22. Qg3 Rc6 23. h4 Qf6 24. h5 Rac8 25. Bg5 Qg7 26. hxg6 hxg6 27. a3
Rb6 28. Bc1 Nf6 29. Qh4 Rbc6 30. Bh6 Qh8 31. Qg5 Ng4 32. Qxg4 Qxh6 33. Qg3 Nd6
34. Re5 Rb6 35. Rg5 Nf5 36. Bxf5 exf5 37. Rxf5 Rxb2 38. Rxd5 Qd2 39. Rde5 Kg7
40. Re7 Rc6 41. Qe5+ Rf6 42. Rf1 Qxc3 43. Re8 Qxa3 44. Qh2 g5 45. Qh8+ Kg6 46.
Rg8+ Kf5 47. g4+ 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.17"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Cuartas, Carlos Enrique"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "2320"]
[BlackElo "2320"]
[PlyCount "106"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 g6 2. e4 Bg7 3. d4 c6 4. Nbd2 d6 5. Be2 Nh6 6. O-O O-O 7. c3 d5 8. h3
Nd7 9. exd5 cxd5 10. Qb3 Nb8 11. Ne5 Nc6 12. Nxc6 bxc6 13. Nf3 Qc7 14. Qa4 f6
15. Ne1 e5 16. Nd3 Nf7 17. Be3 Nd6 18. Nb4 Bb7 19. Na6 Bxa6 20. Bxa6 Rab8 21.
b4 f5 22. Rac1 f4 23. dxe5 fxe3 24. exd6 exf2+ 25. Kh1 Qxd6 26. Qd1 Bh6 27. Rc2
Be3 28. Qg4 Rbe8 29. Bd3 Kg7 30. c4 h5 31. c5 Qf6 32. Qg3 Bd4 33. Rcxf2 Bxf2
34. Rxf2 Re1+ 35. Kh2 Qe5 36. Qxe5+ Rxe5 37. Rd2 Rf4 38. Rb2 Re3 39. Ba6 d4 40.
Rd2 d3 41. a3 Rd4 42. Kg1 Re1+ 43. Kf2 Ra1 44. Ke3 Rd8 45. Rxd3 Rxd3+ 46. Bxd3
Rxa3 47. Kd4 Kf6 48. Be4 Ra4 49. Bxc6 Rxb4+ 50. Kd5 Ke7 51. Ke5 a5 52. Bd5 a4
53. c6 Rb5 0-1

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.18"]
[Round "8"]
[White "Gonzalez Rodriguez, Jorge Armando"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A00"]
[BlackElo "2320"]
[PlyCount "46"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nc3 d5 2. e4 dxe4 3. Nxe4 e5 4. Bc4 Nc6 5. Nf3 Be7 6. d3 Nf6 7. Nfg5 O-O 8.
Nxf7 Rxf7 9. Ng5 Nd5 10. Nxf7 Kxf7 11. Qf3+ Ke6 12. Be3 Na5 13. O-O-O c6 14.
Rhe1 Qf8 15. Bxd5+ cxd5 16. Qg3 Nc6 17. Bf4 Kf7 18. Bxe5 Kg8 19. Kb1 Bf5 20. f4
Qf7 21. Rd2 d4 22. a3 Nxe5 23. fxe5 Be6 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.19"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Minaya Molano, Juan M"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "2320"]
[BlackElo "2325"]
[PlyCount "78"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 Nc6 3. d3 g6 4. g3 Bg7 5. Bg2 d6 6. Nbd2 e6 7. O-O Nge7 8. Re1
O-O 9. a4 e5 10. c3 h6 11. Nc4 Be6 12. Rb1 f5 13. exf5 Nxf5 14. b3 Qd7 15. h3
Rf7 16. Rb2 Raf8 17. Rc2 Nfe7 18. g4 Bd5 19. Ncd2 Nd8 20. c4 Bc6 21. Ne4 Ne6
22. Nh2 b6 23. Nf1 Nd4 24. Rb2 d5 25. cxd5 Nxd5 26. Nfg3 Nf4 27. Re3 a5 28. Kh2
Bd5 29. h4 Nxg2 30. Kxg2 Nf3 31. Qxf3 Rxf3 32. Rxf3 Qxg4 33. Rxf8+ Kxf8 34. h5
gxh5 35. f3 Qg6 36. Kh2 Be6 37. Rg2 Bxb3 38. Ne2 Qc6 39. N2c3 Bf7 0-1

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.20"]
[Round "10"]
[White "Garcia, Luis E"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "2350"]
[BlackElo "2320"]
[PlyCount "78"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. Nf3 e6 6. O-O d5 7. cxd5 exd5 8. d4
cxd4 9. Nb5 a6 10. Nbxd4 Nge7 11. Be3 O-O 12. Qd2 Re8 13. Rfd1 Bg4 14. h3 Bxf3
15. Bxf3 Ne5 16. Bg5 Nxf3+ 17. Nxf3 Qd7 18. Bxe7 Rxe7 19. Kg2 Qb5 20. e3 Qxb2
21. Qxb2 Bxb2 22. Rab1 Bg7 23. Rxd5 Rc8 24. a4 h6 25. Rd3 Rc2 26. Rd8+ Kh7 27.
Rb3 Rb2 28. Rxb2 Bxb2 29. Rb8 Kg7 30. Kf1 Rd7 31. Ke2 Bc3 32. Rc8 Bf6 33. Nd2
Be7 34. Nb3 b5 35. axb5 axb5 36. Rb8 b4 37. Nd4 Rc7 38. Kd2 h5 39. Nc2 Rc4 0-1

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.21"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Yepez Jaramillo, Marcos"]
[Result "1-0"]
[ECO "D41"]
[WhiteElo "2320"]
[PlyCount "81"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. Nf3 c5 3. e3 cxd4 4. exd4 d5 5. c4 e6 6. Nc3 Be7 7. cxd5 Nxd5 8.
Bd3 Nxc3 9. bxc3 Qc7 10. Qc2 Nd7 11. O-O Nf6 12. Re1 O-O 13. Ne5 h6 14. Re3 Nd7
15. Qe2 Nxe5 16. dxe5 Bg5 17. Rg3 Bxc1 18. Rxc1 f5 19. exf6 Rxf6 20. Rd1 e5 21.
Be4 Be6 22. Qb5 Raf8 23. f3 b6 24. Qb2 Qc4 25. Qd2 Rf4 26. h3 R4f6 27. Kh2 Kh8
28. Qd6 Qxa2 29. Qxe5 Qe2 30. Rd6 Qa2 31. Rc6 Bg8 32. Rc7 Bf7 33. Qe7 Re8 34.
Qd7 a5 35. Rxg7 Kxg7 36. Qxe8 Qd2 37. Qe7 Qd6+ 38. Qxd6 Rxd6 39. c4 Kf6 40. Kg3
a4 41. Kf4 1-0

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.17"]
[Round "1"]
[White "Verduga Zavala, Denis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "2265"]
[BlackElo "2320"]
[PlyCount "21"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. d3 Nf6 6. a3 O-O 7. Rb1 a5 8. Bd2 d6
9. Qc1 Bd7 10. Bh6 a4 11. h4 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.18"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Remon, Adelquis"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "2320"]
[BlackElo "2200"]
[PlyCount "84"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. d4 Nf6 2. Nf3 c5 3. e3 g6 4. c4 Bg7 5. Nc3 O-O 6. Be2 Nc6 7. d5 Nb4 8. O-O
d6 9. a3 Na6 10. Qc2 Nc7 11. Rd1 a6 12. Rb1 Bg4 13. h3 Bxf3 14. Bxf3 b5 15. b3
Rb8 16. Bd2 Nd7 17. Be2 Rb7 18. Na2 Qa8 19. Ba5 Rfb8 20. Nc3 Ne8 21. Ne4 bxc4
22. Bxc4 Ne5 23. Bc3 Nc7 24. Bxe5 Bxe5 25. f4 Bg7 26. a4 Rb4 27. Rd3 Qb7 28.
Rf1 Qc8 29. g4 Nb5 30. axb5 axb5 31. Nd2 bxc4 32. Nxc4 Qb7 33. Na5 Qb5 34. Nc6
Rxb3 35. Rxb3 Qxb3 36. Qe4 Re8 37. f5 Bf6 38. Rf3 Ra8 39. Rf1 Ra2 40. fxg6 Qb2
41. Nxe7+ Bxe7 42. gxf7+ Kg7 0-1

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.19"]
[Round "3"]
[White "Durao, Joaquim"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B15"]
[WhiteElo "2325"]
[BlackElo "2320"]
[PlyCount "31"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Be3 d5 5. e5 h5 6. Nge2 Nh6 7. Nf4 Bf5 8. Bd3
e6 9. O-O Nd7 10. Be2 Qe7 11. f3 O-O-O 12. a3 Nxe5 13. dxe5 d4 14. Bxd4 c5 15.
Nb5 cxd4 16. Nd6+ 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.20"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Rodriguez Cordoba, Jesus R"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2320"]
[BlackElo "2385"]
[PlyCount "36"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. d3 h6 6. Be3 Bb6 7. Nd5 d6 8. Nxb6
axb6 9. h3 Be6 10. Bb5 O-O 11. Bxc6 bxc6 12. O-O c5 13. c4 Nd7 14. g4 g5 15.
Kg2 Kg7 16. Ng1 Rh8 17. Ne2 Nf8 18. Ng3 Ng6 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.21"]
[Round "5"]
[White "Perez Perez, Francisco Jose"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D79"]
[WhiteElo "2325"]
[BlackElo "2320"]
[PlyCount "21"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. Nf3 g6 2. g3 Bg7 3. Bg2 d5 4. O-O Nf6 5. c4 c6 6. cxd5 cxd5 7. d4 O-O 8. Nc3
b6 9. Bf4 Bb7 10. Rc1 Nc6 11. Ne5 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.22"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Pineda, Boris"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2320"]
[BlackElo "2200"]
[PlyCount "68"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Bg4 6. Be2 e6 7. Be3 cxd4 8.
cxd4 Bb4+ 9. Nc3 Nf6 10. h3 Bh5 11. O-O Bxc3 12. bxc3 O-O 13. Qb3 Na5 14. Qa4
Rfc8 15. Rab1 a6 16. Qb4 Qxa2 17. Rb2 Qd5 18. g4 Bg6 19. Ne5 Nc6 20. Nxc6 bxc6
21. c4 Qd8 22. Ra1 Rcb8 23. Qa3 h5 24. Bf4 Rxb2 25. Qxb2 hxg4 26. hxg4 Qc8 27.
Qb6 e5 28. dxe5 Nxg4 29. f3 Qf5 30. Qxc6 Qxf4 31. Qxa8+ Kh7 32. fxg4 Be4 33.
Qxa6 Qg3+ 34. Kf1 Bg2+ 0-1

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.23"]
[Round "7"]
[White "Frey Beckman, Kenneth"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "D07"]
[WhiteElo "2295"]
[BlackElo "2320"]
[PlyCount "84"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. Bxc4 e6 6. Nc3 Nc6 7. O-O Bd6 8.
Be2 O-O 9. h3 Bh5 10. e4 Bxf3 11. Bxf3 Nxd4 12. Be3 e5 13. g3 Bc5 14. Bg2 Ne6
15. Qe2 c6 16. Bxc5 Nxc5 17. Rfd1 Qe7 18. h4 Rfd8 19. Bh3 Rd4 20. Bg2 Rad8 21.
Rdb1 a5 22. Kf1 h6 23. Bf3 R8d7 24. Qe3 Qd8 25. Re1 Qb6 26. Red1 Rd3 27. Rxd3
Rxd3 28. Qe2 Qd8 29. Ke1 Rd4 30. Qe3 Qd6 31. Kf1 Rd3 32. Qe2 Rd2 33. Qe3 Qd4
34. Qxd4 exd4 35. Ne2 Nfxe4 36. Ke1 Nd3+ 37. Kf1 f5 38. Nxd4 Rxf2+ 39. Kg1 c5
40. Bxe4 fxe4 41. Nb3 e3 42. Nxa5 Ne5 0-1

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.24"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Pesantes Carbajal, Carlos"]
[Result "1-0"]
[ECO "E42"]
[WhiteElo "2320"]
[BlackElo "2325"]
[PlyCount "71"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nge2 d5 6. a3 Bxc3+ 7. Nxc3 cxd4 8.
exd4 O-O 9. Be3 b6 10. cxd5 Nxd5 11. Qf3 Bb7 12. Bd3 f5 13. O-O Rf7 14. Qh3 Nd7
15. Rfe1 Nf8 16. Rad1 Rc8 17. Bd2 Qd7 18. Bb1 Rf6 19. Ba2 Nxc3 20. Bxc3 Rg6 21.
d5 exd5 22. Re5 Kh8 23. Qxf5 Qxf5 24. Rxf5 d4 25. Rxd4 Rxg2+ 26. Kf1 Rxh2 27.
Rg4 Ng6 28. Rf7 Rh1+ 29. Rg1 Ba6+ 30. Kg2 Rxg1+ 31. Kxg1 Rc5 32. Bxg7+ Kg8 33.
Rc7+ Bc4 34. Bxc4+ Rxc4 35. Rxc4 Kxg7 36. Rc7+ 1-0

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.25"]
[Round "9"]
[White "Sieiro Gonzalez, Luis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B15"]
[WhiteElo "2225"]
[BlackElo "2320"]
[PlyCount "86"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. h3 d6 5. Be2 Nf6 6. Nc3 O-O 7. a4 d5 8. e5 Ne4
9. O-O c5 10. Bd3 Nxc3 11. bxc3 Nc6 12. Ba3 c4 13. Be2 f6 14. exf6 Bxf6 15. Nh2
Qa5 16. Qe1 Re8 17. Ng4 Bf5 18. Nh6+ Kg7 19. Nxf5+ gxf5 20. Bh5 Rf8 21. Kh1 Kh8
22. f4 Bg7 23. Rf3 Rf6 24. Re3 e6 25. Bc1 Rg8 26. Bd2 Nd8 27. Qe2 b5 28. g4
bxa4 29. g5 Rff8 30. Bc1 e5 31. Ba3 e4 32. Qf2 Ne6 33. Bg6 Qc7 34. Bxf8 Bxf8
35. Bxf5 Nxf4 36. Rf1 Bd6 37. Qh4 Ng6 38. Bxg6 Rxg6 39. Rf6 Rxf6 40. gxf6 Qf7
41. Re1 a3 42. Qg5 a5 43. Rb1 a4 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.26"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Hernandez, Jose de Jesus"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2320"]
[BlackElo "2300"]
[PlyCount "55"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. Nf3 e6 2. b3 c5 3. Bb2 Nf6 4. e3 Be7 5. Be2 O-O 6. O-O b6 7. d3 d5 8. Nbd2
Bb7 9. Ne5 Nc6 10. Ndf3 Nxe5 11. Nxe5 Nd7 12. Nxd7 Qxd7 13. f4 Qd8 14. Bf3 Bf6
15. Qc1 Rb8 16. a4 a5 17. Rb1 Re8 18. Bxf6 Qxf6 19. Qd2 Red8 20. Rbe1 Rd7 21.
e4 dxe4 22. Bxe4 Bxe4 23. Rxe4 Rbd8 24. Re5 g6 25. Qe3 Rd4 26. g3 Kg7 27. h4 h5
28. Re1 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.27"]
[Round "11"]
[White "Ostos, Julio"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "C60"]
[WhiteElo "2255"]
[BlackElo "2320"]
[PlyCount "143"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8.
exd5 Nxd5 9. Re1+ Be6 10. Ne5 O-O 11. Nxc6 bxc6 12. Bxc6 Rb8 13. Nc3 Nb4 14.
Be4 Bxd4 15. Bh6 Bxf2+ 16. Kxf2 Qh4+ 17. Kg1 Qxh6 18. Qd4 a5 19. a3 Na6 20. Bd5
Rb6 21. Bxe6 fxe6 22. Rf1 Rd6 23. Qe5 Rf5 24. Rxf5 gxf5 25. Re1 Qg7 26. Qxa5
Qd4+ 27. Kh1 Nc5 28. Nb5 Qd2 29. Qxd2 Rxd2 30. b4 Nd3 31. Ra1 c5 32. bxc5 Nxc5
33. a4 Nxa4 34. g4 Nc5 35. gxf5 exf5 36. Rf1 Rd5 37. Nc3 Re5 38. Kg2 Kg7 39.
Ra1 Ne6 40. Kf3 Rc5 41. Ne2 Kf6 42. Ra3 Rc4 43. Ra6 h5 44. Ng3 h4 45. Ne2 Rb4
46. Ke3 Re4+ 47. Kf3 Kg5 48. Ra8 Rb4 49. Ra3 Nc5 50. Re3 Rb2 51. Re5 Nd7 52.
Ra5 Rb3+ 53. Kf2 Rd3 54. Ng1 h3 55. Nf3+ Kg4 56. Ne5+ Nxe5 57. Rxe5 Rd1 58. Re2
Rh1 59. Ke3 f4+ 60. Ke4 Rf1 61. Kd4 Kf3 62. Ra2 Rf2 63. Ra3+ Kg4 64. Ra8 Rxh2
65. Rg8+ Kf3 66. Rh8 Rh1 67. Ke5 h2 68. Kf5 Ra1 69. Rxh2 Ra5+ 70. Ke6 Kg3 71.
Rh1 f3 72. Rg1+ 0-1

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.28"]
[Round "12"]
[White "Cuartas, Carlos Enrique"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C26"]
[WhiteElo "2425"]
[BlackElo "2320"]
[PlyCount "19"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. e4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. Nge2 c6 6. d4 d5 7. exd5 exd4 8.
Qxd4 Nxd5 9. O-O Nxc3 10. bxc3 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.29"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Barreras, Alberto"]
[Result "1/2-1/2"]
[ECO "C26"]
[WhiteElo "2320"]
[BlackElo "2340"]
[PlyCount "185"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 Nxd5 5. Bg2 Nxc3 6. bxc3 Nc6 7. Ne2 Bc5 8.
O-O O-O 9. Rb1 Bb6 10. d3 Bg4 11. h3 Bh5 12. g4 Bg6 13. Ng3 Ne7 14. Ba3 c6 15.
Qe2 Re8 16. c4 Qc7 17. Kh1 Rad8 18. h4 h6 19. h5 Bh7 20. Rg1 f5 21. c5 Ba5 22.
Bb2 Nd5 23. gxf5 Qe7 24. Qg4 Nf6 25. Qh3 Qxc5 26. Ne4 Qe7 27. Nxf6+ Qxf6 28.
Be4 Bb6 29. Rg2 Rd7 30. f4 Bd4 31. Bxd4 exd4 32. Rbg1 Rf8 33. Rg6 Bxg6 34. Rxg6
Qe7 35. Qg4 Rf6 36. Kg2 c5 37. Kf3 b5 38. Qg1 a6 39. Qb1 Rxg6 40. fxg6 Qh4 41.
Qb3+ c4 42. Qa3 Qh3+ 43. Kf2 Qe3+ 44. Kg2 Qxf4 45. Qxa6 Qg5+ 46. Kf2 Rd8 47.
Qe6+ Kh8 48. Qf7 Qc5 49. Kg2 Rf8 50. Qd5 Qb4 51. Qxd4 Qd2+ 52. Kh3 Qxc2 53.
dxc4 Qxc4 54. Qd5 Re8 55. Bf3 Qf4 56. Kg2 Qe5 57. Kh3 Qb8 58. Qf5 Re5 59. Qc2
Rg5 60. Bg4 Qa8 61. Kg3 Qa3+ 62. Kf2 Qf8+ 63. Kg3 Qd6+ 64. Kf3 Rc5 65. Qe4 Rc3+
66. Ke2 Qb8 67. Kd2 Ra3 68. Be6 Ra4 69. Qd3 Qh2+ 70. Kc1 Qg1+ 71. Kb2 Rd4 72.
Qc2 Qg5 73. Kb1 Rd8 74. Qe2 Rd2 75. Qf1 Qf6 76. Qc1 Qd8 77. Bb3 Rh2 78. Qc5 Qb8
79. Bc2 Rg2 80. Qb4 Qc8 81. Qe4 Rh2 82. Bd1 Qd8 83. Be2 Rh4 84. Qc6 Rb4+ 85.
Kc1 Ra4 86. Kb1 Qg8 87. Qc2 Qe6 88. Qd2 Qe4+ 89. Kc1 Rd4 90. Qc3 Qf4+ 91. Kc2
Qf5+ 92. Bd3 Qg4 93. Qc5 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.30"]
[Round "14"]
[White "Andres Mendez, Miguel"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A81"]
[WhiteElo "2355"]
[BlackElo "2320"]
[PlyCount "18"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. Nf3 g6 2. g3 Bg7 3. Bg2 f5 4. O-O Nf6 5. d4 O-O 6. Nbd2 d6 7. Re1 Nc6 8. e4
e5 9. dxe5 dxe5 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.05.31"]
[Round "15"]
[White "De Greif, Boris"]
[Black "Szmetan, Jorge"]
[Result "1/2-1/2"]
[ECO "A47"]
[WhiteElo "2320"]
[BlackElo "2450"]
[PlyCount "81"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. d4 Nf6 2. Nf3 c5 3. c3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. Nbd2 O-O 8. Re1
cxd4 9. Nxd4 Bxg2 10. Kxg2 Nc6 11. Nxc6 dxc6 12. Nf3 Qc8 13. Bg5 h6 14. Bxf6
Bxf6 15. Qa4 Rd8 16. Rad1 Qb7 17. Rxd8+ Rxd8 18. Rd1 Rd5 19. e4 b5 20. Qc2 Rxd1
21. Qxd1 c5 22. Qe2 c4 23. a3 a6 24. Kf1 Be7 25. h4 Bc5 26. Nd2 Qc6 27. a4 Be7
28. axb5 axb5 29. Ke1 Qa8 30. Qd1 Bc5 31. Ke2 Qd8 32. Kf1 Qd3+ 33. Qe2 Qc2 34.
Nf3 Qb1+ 35. Kg2 Qa2 36. Qd2 Qa8 37. Qf4 Qb7 38. h5 Be7 39. Qe3 Bf6 40. Nd2 Qc6
41. Nf3 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.06.01"]
[Round "16"]
[White "Garcia, Wilfredo"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A42"]
[WhiteElo "2320"]
[BlackElo "2320"]
[PlyCount "115"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6 5. Be3 e5 6. Nge2 f5 7. f3 Nf6 8. d5 Ne7
9. Qd2 fxe4 10. fxe4 Ng4 11. Bg5 h6 12. Bh4 g5 13. Bg3 Ng6 14. O-O-O O-O 15.
Ng1 c5 16. Nf3 Nf6 17. Bd3 a6 18. Rdf1 Nh5 19. Bf2 Qa5 20. Be3 Bd7 21. Be2 Nhf4
22. Ne1 b5 23. Kb1 Rfb8 24. g3 Nxe2 25. Nxe2 Qxd2 26. Bxd2 bxc4 27. h4 gxh4 28.
gxh4 Nf4 29. Nc3 Kh7 30. Kc2 Rf8 31. Bxf4 exf4 32. Nf3 Rae8 33. Nd2 Be5 34.
Nxc4 Bb5 35. Nxb5 axb5 36. Nxe5 Rxe5 37. Kd3 f3 38. Rf2 Rf4 39. Re1 Kg6 40. Re3
Kh5 41. Rfxf3 Rexe4 42. Rxf4 Rxf4 43. Re6 Rd4+ 44. Kc3 Rxd5 45. b3 Rd4 46. a4
bxa4 47. bxa4 Kxh4 48. a5 h5 49. a6 Kg3 50. Re3+ Kf4 51. Rd3 Ra4 52. Rxd6 h4
53. Kb3 Ra5 54. Kc4 h3 55. Rh6 Kg3 56. Rg6+ Kf2 57. Rh6 Kg2 58. Rg6+ 1/2-1/2

[Event "Capablanca Memorial-B 13th"]
[Site "Cienfuegos"]
[Date "1976.06.02"]
[Round "17"]
[White "De Greif, Boris"]
[Black "Garcia, Gilberto"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2320"]
[BlackElo "2265"]
[PlyCount "81"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]

1. e4 e6 2. d3 b6 3. Nf3 Bb7 4. g3 Be7 5. Bg2 d6 6. Nbd2 Nd7 7. Nc4 Bf6 8. h4
Qe7 9. Qe2 h6 10. a4 a5 11. Kf1 g6 12. e5 Bg7 13. exd6 cxd6 14. Bf4 e5 15. Re1
Kf8 16. Bc1 Ngf6 17. b3 Kg8 18. Ba3 Ne8 19. Nfd2 Nc5 20. Nxb6 Bxg2+ 21. Kxg2
Qb7+ 22. Qf3 e4 23. Nxe4 Qxb6 24. Nxc5 Rc8 25. Re7 dxc5 26. Qxf7+ Kh7 27. Bb2
Qc6+ 28. Kh2 Rg8 29. Re6 Nf6 30. Rxc6 Rxc6 31. Re1 Rf8 32. Qb7 Rd6 33. Re7 Rg8
34. f3 g5 35. hxg5 hxg5 36. g4 Kg6 37. Bxf6 Rxf6 38. Qe4+ Kh6 39. Kg2 Rh8 40.
Re6 Rhf8 41. Qc6 1-0

[Event "Haifa ol (Men)"]
[Site "Haifa"]
[Date "1976.10.27"]
[Round "3.4"]
[White "De Greif, Boris"]
[Black "Viglundsson, Bjorgvin"]
[Result "1-0"]
[ECO "B18"]
[WhiteElo "2320"]
[BlackElo "2310"]
[PlyCount "67"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Iceland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ISL"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Bc4 Nf6 7. N1e2 e6 8.
O-O Bd6 9. f4 Qd7 10. Bd3 Bxd3 11. Qxd3 g6 12. b3 Na6 13. Bb2 Be7 14. c4 O-O-O
15. Rad1 h5 16. Qf3 h4 17. Nh1 Rh5 18. Nf2 Ra5 19. a4 Nb4 20. Bc3 Rh5 21. Qe3
Kb8 22. g4 hxg3 23. Nxg3 Rdh8 24. Nxh5 Rxh5 25. h3 Rf5 26. Ng4 a5 27. Bxb4 axb4
28. Ne5 Qe8 29. a5 Nh5 30. a6 g5 31. d5 c5 32. dxe6 gxf4 33. exf7 Qh8 34. Qe4
1-0

[Event "Haifa ol (Men)"]
[Site "Haifa"]
[Date "1976.10.28"]
[Round "4.3"]
[White "De Greif, Boris"]
[Black "Diaz, Alberto"]
[Result "1/2-1/2"]
[ECO "E61"]
[WhiteElo "2320"]
[PlyCount "71"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Venezuela"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "VEN"]

1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. Nc3 O-O 5. Bg5 c5 6. e3 d6 7. Be2 h6 8. Bh4 g5
9. Bg3 Nh5 10. d5 Nd7 11. Qc2 Nxg3 12. hxg3 Nf6 13. Bd3 Re8 14. Rd1 a6 15. Kf1
Qc7 16. Nd2 Rb8 17. f3 e6 18. dxe6 Bxe6 19. Nde4 Nxe4 20. Nxe4 Red8 21. Nc3 Qc6
22. Kf2 b5 23. Be4 Qc7 24. cxb5 axb5 25. Nd5 Bxd5 26. Bxd5 Qe7 27. Qf5 Re8 28.
Be4 Qe6 29. Qh7+ Kf8 30. Rd5 Qf6 31. Rhd1 Rb6 32. R1d2 Re5 33. g4 Rxd5 34. Bxd5
Qg6 35. Qxg6 fxg6 36. a3 1/2-1/2

[Event "Haifa ol (Men)"]
[Site "Haifa"]
[Date "1976.10.31"]
[Round "6.4"]
[White "De Greif, Boris"]
[Black "Pane, L."]
[Result "1-0"]
[ECO "C28"]
[WhiteElo "2320"]
[PlyCount "99"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "PAR"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Na5 5. Nge2 Nxc4 6. dxc4 d6 7. O-O Be6 8.
b3 c6 9. Qd3 Qc7 10. f4 Bd7 11. h3 g6 12. a4 h5 13. a5 Rd8 14. Qf3 d5 15. fxe5
dxe4 16. Nxe4 Nxe4 17. Qxe4 Bf5 18. Qf4 h4 19. Be3 Rh5 20. e6 Bd6 21. exf7+
Kxf7 22. Qf3 Kg8 23. Nd4 Be5 24. Nxf5 Bxa1 25. Qg4 Qh7 26. Nxh4 Rxh4 27. Qe6+
Kh8 28. Rxa1 Qg7 29. Rf1 Rh5 30. Rf6 Rd1+ 31. Kf2 Rd7 32. Bf4 Qe7 33. Qxe7 Rxe7
34. a6 Kg7 35. axb7 Rxb7 36. Rxc6 Rf5 37. Kg3 Re7 38. Ra6 Rff7 39. h4 Re2 40.
c3 Rd7 41. Kf3 Ree7 42. Bd6 Re1 43. Bc5 Kh6 44. Be3+ Kh7 45. Bd4 Rf7+ 46. Kg3
Rd1 47. c5 Kh6 48. c6 Kh5 49. Ra5+ Kh6 50. Rd5 1-0

[Event "Haifa ol (Men)"]
[Site "Haifa"]
[Date "1976.11.01"]
[Round "7.4"]
[White "Goldenberg, Richard"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A86"]
[BlackElo "2320"]
[PlyCount "116"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "France"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "COL"]

1. g3 f5 2. d4 Nf6 3. c4 g6 4. Nc3 Bg7 5. Bg2 O-O 6. Nh3 Nc6 7. O-O d6 8. Nf4
e5 9. dxe5 Nxe5 10. b3 c6 11. Ba3 Nf7 12. Qc2 Qa5 13. Bb2 Bd7 14. Rad1 Rfe8 15.
h4 Rad8 16. e3 Bc8 17. a3 Qc7 18. b4 Ne5 19. Nce2 Qf7 20. Rc1 h6 21. Nd3 g5 22.
hxg5 hxg5 23. Nd4 Nxd3 24. Qxd3 Ng4 25. Qc2 Qh5 26. Rfe1 Be5 27. Nf3 Be6 28.
Red1 Bxb2 29. Qxb2 d5 30. Nd4 dxc4 31. Nxe6 Rxd1+ 32. Rxd1 Rxe6 33. Qd4 Ne5 34.
Qd8+ Re8 35. Qd6 Qg6 36. Qd4 a6 37. f4 gxf4 38. exf4 Nf7 39. Qxc4 Qxg3 40. Kf1
Qe3 41. a4 Re6 42. Bh1 Kg7 43. Qd4+ Qxd4 44. Rxd4 Nd6 45. Bf3 Kf6 46. Kf2 Ke7
47. a5 Rh6 48. Kg3 Nb5 49. Rd1 Nc7 50. Re1+ Ne6 51. Bd1 Kf6 52. Bc2 Rg6+ 53.
Kf2 Nxf4 54. Re8 Rg2+ 55. Kf3 Rxc2 56. Kxf4 Rc4+ 57. Ke3 Rxb4 58. Rf8+ Ke5 0-1

[Event "Haifa ol (Men)"]
[Site "Haifa"]
[Date "1976.11.02"]
[Round "8.4"]
[White "Bonner, Gerald"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C28"]
[WhiteElo "2255"]
[BlackElo "2320"]
[PlyCount "101"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Scotland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "SCO"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Bb4 4. d3 Nc6 5. Nf3 d6 6. Bd2 Na5 7. Nd5 Bxd2+ 8.
Nxd2 Nxc4 9. dxc4 O-O 10. Ne3 a5 11. O-O Nd7 12. Qh5 c6 13. Rad1 Nc5 14. f4
exf4 15. Rxf4 Qe7 16. Rdf1 h6 17. Qf3 Bd7 18. Ng4 Bxg4 19. Rxg4 Qe5 20. Qf6
Qxf6 21. Rxf6 h5 22. Rg3 Rfe8 23. Rf4 Re5 24. Rf5 Rae8 25. Rgf3 f6 26. Rxe5
dxe5 27. Nb3 Nxe4 28. Nxa5 Re7 29. Rd3 Nc5 30. Rd8+ Kf7 31. b4 Ne6 32. Rb8 Nd4
33. Rxb7 Rxb7 34. Nxb7 Nxc2 35. b5 cxb5 36. cxb5 Na3 37. b6 Ke7 38. Na5 Kd7 39.
Kf2 g5 40. Ke3 f5 41. b7 Kc7 42. h4 gxh4 43. b8=Q+ Kxb8 44. Nc6+ Kc7 45. Nxe5
Kd6 46. Nf3 Nc2+ 47. Kf4 Nb4 48. a3 Nd5+ 49. Kg5 Kc5 50. Kxh5 Ne3 51. Kg5
1/2-1/2

[Event "Haifa ol (Men)"]
[Site "Haifa"]
[Date "1976.11.06"]
[Round "11.3"]
[White "De Greif, Boris"]
[Black "Janetschek, Karl"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2320"]
[BlackElo "2365"]
[PlyCount "83"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Austria"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "AUT"]

1. e4 c5 2. Nf3 e6 3. d3 Nf6 4. g3 d5 5. Nbd2 Nc6 6. Bg2 Be7 7. O-O O-O 8. Re1
Qc7 9. c3 b5 10. Qe2 a5 11. e5 Nd7 12. h4 a4 13. Nf1 Bb7 14. h5 b4 15. h6 g6
16. a3 bxc3 17. bxc3 Ba6 18. N1h2 Rab8 19. Bf4 Rb3 20. Qd2 Qa5 21. Rec1 d4 22.
c4 Rfb8 23. Ng4 Qxd2 24. Nxd2 R3b6 25. Ne4 g5 26. Nxg5 Bxg5 27. Bxg5 Ncxe5 28.
Nxe5 Nxe5 29. Rd1 Nd7 30. Re1 f6 31. Bd2 Bb7 32. Ba5 Bxg2 33. Bxb6 Bh3 34. Bc7
Rb3 35. f3 Rb2 36. g4 Kf7 37. Rab1 Ra2 38. Rb7 Bg2 39. Bd6 e5 40. Rxd7+ Ke6 41.
Rxh7 Kxd6 42. Rd7+ 1-0

[Event "Haifa ol (Men)"]
[Site "Haifa"]
[Date "1976.11.09"]
[Round "13.3"]
[White "De Greif, Boris"]
[Black "Padilla Liceaga, Jorge"]
[Result "1/2-1/2"]
[ECO "A88"]
[WhiteElo "2320"]
[PlyCount "20"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Columbia"]
[BlackTeam "Honduras"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "HON"]

1. c4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. Nc3 d6 7. d4 c6 8. d5 e5
9. dxe6 Bxe6 10. Qd3 Kh8 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.12"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Minaya Molano, Juan M"]
[Result "1-0"]
[ECO "E67"]
[WhiteElo "2340"]
[BlackElo "2355"]
[PlyCount "61"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. Nf3 Nd7 5. g3 Ngf6 6. Bg2 O-O 7. O-O a6 8. e4
c5 9. Re1 cxd4 10. Nxd4 Nc5 11. h3 Bd7 12. Be3 Rc8 13. Rc1 Qa5 14. a3 Na4 15.
b4 Nxc3 16. Rxc3 Qa4 17. Qc1 Rc7 18. e5 Ne8 19. Bf4 Bc8 20. c5 dxe5 21. Bxe5
Bxe5 22. Rxe5 f6 23. Rd5 e6 24. Rd8 Rd7 25. Rxd7 Qxd7 26. Rc4 Ng7 27. c6 bxc6
28. Bxc6 Qd6 29. Bg2 e5 30. Rxc8 exd4 31. Qc4+ 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.13"]
[Round "2"]
[White "Zapata, Alonso"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[WhiteElo "1900"]
[BlackElo "2340"]
[PlyCount "60"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c3 d5 5. Nxe5 dxe4 6. d4 exd3 7. Bf4 Qd5 8.
Qxd3 Qxg2 9. Rf1 Bf5 10. Qe2 Qe4 11. Qxe4 Bxe4 12. Nd2 Bd5 13. Nxc6 Bxc6 14.
Bxc6+ Nxc6 15. Bxc7 Kd7 16. Bf4 Bd6 17. Bxd6 Rhe8+ 18. Kd1 Kxd6 19. Kc2 Re2 20.
Rae1 Rae8 21. Rxe2 Rxe2 22. Kd3 Re6 23. Nc4+ Kc7 24. Rg1 g6 25. a4 Ne5+ 26.
Nxe5 Rxe5 27. Rg3 Rd5+ 28. Ke2 f5 29. h4 Ra5 30. b3 Rc5 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.14"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Garcia, Luis E"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "2340"]
[BlackElo "2330"]
[PlyCount "62"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 g6 2. e4 Bg7 3. d4 d6 4. Nc3 c6 5. Be2 Nf6 6. O-O O-O 7. a4 Qc7 8. Be3
Nbd7 9. h3 e5 10. dxe5 dxe5 11. Qd2 Re8 12. Rfd1 Bf8 13. Bc4 Nc5 14. Ng5 Ne6
15. Qe2 Nh5 16. Nxe6 Bxe6 17. Bxe6 Rxe6 18. Qc4 Qe7 19. g3 Nf6 20. Rd3 h6 21.
Rad1 Kg7 22. Na2 Qc7 23. f3 Rd6 24. Qc3 Rxd3 25. Rxd3 Be7 26. Nc1 h5 27. a5 b6
28. Nb3 Rd8 29. axb6 axb6 30. Nd2 Rxd3 31. Qxd3 Nd7 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.15"]
[Round "4"]
[White "Silva Morales, Marco Antonio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[BlackElo "2340"]
[PlyCount "60"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. Nc3 Ng6 5. d4 exd4 6. Nxd4 Bc5 7. Nf5 O-O 8.
Qh5 d5 9. O-O Bxf5 10. exf5 Qh4 11. Qxh4 Nxh4 12. Nxd5 Nd4 13. Bd3 c6 14. Ne3
Rad8 15. b4 Bxb4 16. Rb1 Bc5 17. Rxb7 Rb8 18. Rxb8 Rxb8 19. g3 Nhf3+ 20. Kg2
Ne5 21. Be4 Ne2 22. Bd2 Rd8 23. Be1 f6 24. Bf3 Nd4 25. Bd1 Nxf5 26. Nxf5 Rxd1
27. Bc3 Rxf1 28. Kxf1 Kf7 29. Ke2 g6 30. Nd4 a6 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.16"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Garcia, Gildardo"]
[Result "1-0"]
[ECO "A23"]
[WhiteElo "2340"]
[BlackElo "2340"]
[PlyCount "99"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 e4 5. Nd4 Qb6 6. Nc2 d5 7. Bg2 Be6 8. O-O
Nbd7 9. cxd5 cxd5 10. d3 Rd8 11. Be3 Qa6 12. Nd4 exd3 13. exd3 Bc5 14. Qa4 Qb6
15. Nxe6 fxe6 16. Bxc5 Qxc5 17. Rae1 Kf7 18. d4 Qc6 19. Qb3 Rhe8 20. Re2 Nb6
21. Rfe1 Nc4 22. Bh3 Rd6 23. Nb5 Ne4 24. Rxe4 dxe4 25. Qxc4 Rd7 26. Qxc6 bxc6
27. Nc3 Rxd4 28. Nxe4 e5 29. Bg2 a5 30. h4 h6 31. Rc1 Rb8 32. b3 a4 33. Rxc6
axb3 34. axb3 Rxb3 35. Nd6+ Kg8 36. h5 Rb8 37. Nf5 Rd1+ 38. Bf1 Rbb1 39. Ne3
Rdc1 40. Rd6 Rc5 41. Kg2 Kf7 42. Rg6 Rb7 43. Bc4+ Kf8 44. Ra6 Rb4 45. Ra8+ Ke7
46. Nd5+ Ke6 47. Nxb4+ Rxc4 48. Nd3 Rc3 49. Nb2 Rc1 50. Rd8 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.17"]
[Round "6"]
[White "Cuartas, Carlos Enrique"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A03"]
[WhiteElo "2440"]
[BlackElo "2340"]
[PlyCount "91"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. f4 Nf6 2. Nf3 g6 3. d3 d5 4. g3 Bg7 5. Bg2 O-O 6. O-O c6 7. c3 Nbd7 8. Qc2
a5 9. e4 dxe4 10. dxe4 Nc5 11. Ne5 Ng4 12. Nxg4 Bxg4 13. h3 Be6 14. Rd1 Qc8 15.
Be3 b6 16. Kh2 a4 17. Na3 f5 18. Bxc5 bxc5 19. exf5 Bxf5 20. Qe2 Qa6 21. Qe3 e5
22. fxe5 Rae8 23. Bf1 Qb7 24. Nc4 Be6 25. b3 axb3 26. Nd6 Qb8 27. Nxe8 Rxe8 28.
axb3 Qxe5 29. Qxe5 Bxe5 30. Bc4 Bxc4 31. bxc4 Bxc3 32. Ra7 Bd4 33. Rb1 h5 34.
h4 Be5 35. Kh3 Bd6 36. Rbb7 Re6 37. Ra8+ Bf8 38. Rc8 Rf6 39. Rbc7 Rf2 40. Rxc6
Kg7 41. R8c7+ Kh6 42. Re6 Ra2 43. Rcc6 Ra4 44. Rxg6+ Kh7 45. Rgf6 Bg7 46. Rf4
1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.19"]
[Round "7"]
[White "Agudelo, Antonio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "2300"]
[BlackElo "2340"]
[PlyCount "82"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Nf6 6. Bd2 O-O 7. h4 d6 8. Qc1
Nd4 9. Kf1 Rb8 10. Nf3 a6 11. Nxd4 cxd4 12. Nd5 b5 13. Nxf6+ Bxf6 14. h5 bxc4
15. hxg6 fxg6 16. Qxc4+ e6 17. b4 Be5 18. Kg1 Rf7 19. Rc1 d5 20. Qb3 Bd7 21.
Qd1 Bd6 22. a3 Qf6 23. Qe1 Rbf8 24. Bh6 Rc8 25. Rxc8+ Bxc8 26. Bf3 Bb7 27. Bg4
e5 28. f3 Rc7 29. Qd2 e4 30. f4 Be7 31. Bg5 Qd6 32. Bxe7 Rxe7 33. Kg2 h5 34.
Bh3 h4 35. Rf1 hxg3 36. f5 e3 37. Qe1 Bc8 38. Qxg3 Qxg3+ 39. Kxg3 Rc7 40. fxg6
Bxh3 41. Kxh3 Rc2 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.20"]
[Round "8"]
[White "Henao, Raul Fernando"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[WhiteElo "2290"]
[BlackElo "2340"]
[PlyCount "65"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. O-O g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8.
exd5 Nxd5 9. Bg5 Qd6 10. Re1+ Be6 11. Nbd2 O-O 12. Ne4 Qb4 13. Bxc6 bxc6 14.
Qc1 Rab8 15. b3 Rb6 16. Bh6 Qe7 17. Bxg7 Kxg7 18. Nc5 Qf6 19. Ne5 Nf4 20. Re4
g5 21. Nxe6+ Qxe6 22. f3 f6 23. Rxf4 gxf4 24. Nc4 Rb5 25. Qxf4 Re8 26. Qxc7+
Re7 27. Qf4 Rd5 28. Rc1 h5 29. h4 Kh7 30. Nd2 Qd6 31. Qxd6 Rxd6 32. Ne4 Rde6
33. Rc5 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.21"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Herrera, Gabriel"]
[Result "1/2-1/2"]
[ECO "A07"]
[WhiteElo "2340"]
[PlyCount "92"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 d5 2. g3 c6 3. d3 Bg4 4. Nbd2 Nd7 5. Bg2 e6 6. O-O Bd6 7. e4 Ne7 8. Qe1
Rc8 9. Qe3 h6 10. b3 O-O 11. Bb2 c5 12. h3 d4 13. Qe1 Bxf3 14. Bxf3 e5 15. Nc4
Bb8 16. a4 Nf6 17. Ba3 b6 18. b4 Re8 19. bxc5 bxc5 20. Qd2 Rc6 21. Rfb1 Qc8 22.
Kg2 Ra6 23. a5 Qc6 24. Rb3 Rc8 25. Rab1 Bd6 26. Rb5 Kh7 27. Bg4 Rc7 28. Qe2
Nxg4 29. hxg4 f6 30. Qf3 Kg6 31. Bc1 Qd7 32. Bd2 Rac6 33. Rh1 Rb7 34. Rxb7 Qxb7
35. g5 fxg5 36. Qh5+ Kf6 37. f4 exf4 38. gxf4 Bxf4 39. Bxf4 gxf4 40. Rf1 Ng6
41. Ne5 Nxe5 42. Qf5+ Ke7 43. Qxe5+ Kf7 44. Rxf4+ Rf6 45. Rxf6+ gxf6 46. Qxc5
Qd7 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.22"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1/2-1/2"]
[ECO "C77"]
[WhiteElo "2340"]
[BlackElo "2410"]
[PlyCount "82"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 Nc6 2. Nf3 e5 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Bc5 7. c3 d6 8. O-O
Be6 9. d3 O-O 10. Be3 Qe7 11. Nbd2 Ng4 12. h3 Nxe3 13. fxe3 Rad8 14. d4 Bxb3
15. axb3 Bb6 16. Rxa6 d5 17. Qxb5 Nb8 18. Raa1 exd4 19. cxd4 dxe4 20. Ne5 Qg5
21. Qe2 f5 22. Rae1 g6 23. Ndc4 Nd7 24. Nxd7 Rxd7 25. Qf2 Qf6 26. Qg3 c5 27.
Nxb6 Qxb6 28. dxc5 Qxc5 29. Rc1 Qb5 30. Rc3 Rfd8 31. Re1 Kg7 32. Kh2 h6 33. h4
Qb8 34. Qxb8 Rxb8 35. Ra1 g5 36. Ra6 f4 37. Re6 Rb5 38. hxg5 hxg5 39. Rc4 Rxb3
40. Rcxe4 fxe3 41. Rxe3 Rxb2 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.23"]
[Round "11"]
[White "Gonzalez, Sergio"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B25"]
[BlackElo "2340"]
[PlyCount "61"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. f4 g6 2. Nf3 Bg7 3. e4 c5 4. Nc3 d6 5. g3 Nc6 6. Bg2 f5 7. d3 Nf6 8. O-O O-O
9. Kh1 e6 10. Be3 Qa5 11. Nd2 Ng4 12. Bg1 Nd4 13. h3 Nh6 14. Nc4 Qa6 15. a4 Bd7
16. Nb5 Bxb5 17. axb5 Qxb5 18. c3 Nc6 19. Nxd6 Qxb2 20. Bxc5 Rfb8 21. Ra3 b6
22. Rf2 bxc5 23. Rxb2 Rxb2 24. Rb3 Rb8 25. Rxb2 Rxb2 26. exf5 Rxg2 27. Kxg2
Nxf5 28. Nxf5 gxf5 29. Qa4 Ne7 30. Qxa7 Nd5 31. Qd7 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.24"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Rodriguez, Mauricio"]
[Result "1-0"]
[ECO "A08"]
[WhiteElo "2340"]
[PlyCount "67"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 g6 2. g3 Bg7 3. Bg2 c5 4. O-O Nc6 5. c3 e5 6. e4 Nge7 7. d3 O-O 8. Nbd2
d5 9. exd5 Nxd5 10. Re1 Nc7 11. Nc4 Re8 12. Ng5 f6 13. Ne4 Bf8 14. f4 Be7 15.
fxe5 fxe5 16. a4 Nd5 17. Bh6 Be6 18. Qe2 b6 19. Rf1 a6 20. h4 Qc7 21. Rf2 b5
22. axb5 axb5 23. Rxa8 Rxa8 24. Ne3 Ra1+ 25. Kh2 Nxe3 26. Qxe3 Nd8 27. Nf6+
Bxf6 28. Rxf6 Bf7 29. Bd5 Qe7 30. Qf3 c4 31. dxc4 bxc4 32. Bxc4 e4 33. Qf4 Qb7
34. Rxf7 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.26"]
[Round "13"]
[White "Alzate, Javier"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E63"]
[WhiteElo "2300"]
[BlackElo "2340"]
[PlyCount "81"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d6 6. d4 Nc6 7. Nc3 a6 8. h3
Rb8 9. Bg5 b5 10. cxb5 axb5 11. d5 Na5 12. Nd4 Bd7 13. Rc1 h6 14. Bxf6 Bxf6 15.
Qd3 Nc4 16. b3 Na3 17. h4 b4 18. Ne4 Bg7 19. Nc6 Bxc6 20. Rxc6 Nb5 21. h5 f5
22. Nd2 g5 23. Rc4 Na3 24. Rc6 Nb5 25. g4 fxg4 26. Rc4 Nc3 27. Rxg4 Qe8 28. f4
Qxh5 29. Bf3 Qh3 30. fxg5 h5 31. Rg2 Rf4 32. Rh2 Qg3+ 33. Kh1 Rh4 34. Rxh4
Qxh4+ 35. Kg2 Qxg5+ 36. Kf2 Rf8 37. Rh1 h4 38. Ne4 Qxd5 39. Rxh4 Qxd3 40. exd3
Nxe4+ 41. Rxe4 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.28"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Gomez, Frank"]
[Result "1-0"]
[ECO "E67"]
[WhiteElo "2340"]
[PlyCount "91"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. Nf3 Nf6 2. d4 d6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. c4 c6 7. Nc3 Nbd7 8. d5
cxd5 9. cxd5 Nc5 10. Nd4 a5 11. h3 Bd7 12. Be3 Qb8 13. a4 Qc8 14. Kh2 h5 15.
Bg5 Kh7 16. e4 Ng8 17. Ra3 Qe8 18. Re1 Rc8 19. Bf1 Na6 20. Ncb5 Nb4 21. Rc3
Bxb5 22. Bxb5 Qd8 23. Be3 Nf6 24. Qb1 Nd7 25. Rxc8 Qxc8 26. Rc1 Qd8 27. f4 Nc5
28. Rd1 Qc7 29. g4 hxg4 30. hxg4 Rh8 31. Kg3 Kg8 32. b3 Bf6 33. Nf3 Qc8 34. Rc1
b6 35. Bc4 Kf8 36. e5 dxe5 37. fxe5 Qb8 38. Bd4 Bg7 39. Re1 Nd7 40. Qe4 Nf6 41.
Qe2 Nbxd5 42. Ng5 Bh6 43. Rh1 Kg7 44. Rxh6 Rxh6 45. Qf3 e6 46. Bxd5 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.29"]
[Round "15"]
[White "Gutierrez Castillo, Jose Antonio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C71"]
[BlackElo "2340"]
[PlyCount "28"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c4 Bg4 6. Bxc6+ bxc6 7. h3 Bxf3 8.
Qxf3 Nf6 9. O-O Be7 10. Nc3 O-O 11. d3 Rb8 12. b3 Nd7 13. Be3 Bg5 14. d4 Bxe3
1/2-1/2

[Event "Buenos Aires ol (Men)"]
[Site "Buenos Aires"]
[Date "1978.11.02"]
[Round "8"]
[White "Hoen, Ragnar Harald"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C51"]
[WhiteElo "2370"]
[BlackElo "2320"]
[PlyCount "54"]
[EventDate "1978.10.25"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Norway"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "NOR"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 Na5 7. Nxe5 Nxc4 8.
Nxc4 d5 9. exd5 Qxd5 10. Ne3 Qd8 11. O-O Nf6 12. Qf3 c6 13. Nf5 Bxf5 14. Qxf5
Qd5 15. Qd3 O-O 16. Nd2 Rad8 17. Nf3 Rfe8 18. Re1 Nd7 19. c4 Qa5 20. Bd2 Qa6
21. Qb3 Bf6 22. Rab1 b6 23. a4 Rxe1+ 24. Rxe1 Nf8 25. Be3 h6 26. Rd1 Ng6 27. h3
Qa5 1/2-1/2

[Event "Buenos Aires ol (Men)"]
[Site "Buenos Aires"]
[Date "1978.11.08"]
[Round "13"]
[White "Aldrete, Jorge"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D03"]
[WhiteElo "2310"]
[BlackElo "2320"]
[PlyCount "83"]
[EventDate "1978.10.25"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Mexico"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "MEX"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 O-O 6. Bd3 c5 7. c3 Nc6 8. O-O
Qb6 9. Rb1 Re8 10. b4 cxb4 11. cxb4 Bg4 12. Qb3 Bxf3 13. Nxf3 e6 14. Rfc1 Rec8
15. a3 Ne8 16. Bf4 Bf8 17. Qa2 a6 18. Rc2 f6 19. h4 Na7 20. Rbc1 Rxc2 21. Rxc2
Rc8 22. Rxc8 Nxc8 23. Qc2 Ne7 24. h5 Kf7 25. hxg6+ hxg6 26. g4 Qc6 27. g5 Qxc2
28. Bxc2 Bg7 29. gxf6 Bxf6 30. Ng5+ Bxg5 31. Bxg5 Nc6 32. Bf4 Nf6 33. Kf1 b5
34. Bc7 Ne4 35. Ke2 Nc3+ 36. Kd3 Na4 37. Kd2 g5 38. Kc1 Kf6 39. Bd1 Kg6 40. Kc2
Kf6 41. Bh5 Ke7 42. Be2 1/2-1/2

[Event "Buenos Aires ol (Men)"]
[Site "Buenos Aires"]
[Date "1978.11.10"]
[Round "14"]
[White "Braga, Cicero Nogueira"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C55"]
[BlackElo "2320"]
[PlyCount "109"]
[EventDate "1978.10.25"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ARG"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[WhiteTeam "Brazil"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "BRA"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 d6 5. dxe5 dxe5 6. Qxd8+ Bxd8 7. Nc3 Nf6
8. Be3 Bg4 9. O-O-O O-O 10. Rd2 Re8 11. Ng5 Bh5 12. f3 h6 13. Nh3 Na5 14. Be2
Nh7 15. Rhd1 Nf8 16. Rd5 Nc6 17. Bb5 a6 18. Bxc6 bxc6 19. Rc5 Re6 20. Nf2 f6
21. Nd3 Be8 22. Ra5 Be7 23. Na4 Nd7 24. Nac5 Bxc5 25. Bxc5 Nb8 26. Ba3 Bf7 27.
b3 g5 28. Kd2 Re8 29. Ke3 Be6 30. Nc5 Bc8 31. Bb2 Kf7 32. g3 Rg8 33. Rd2 h5 34.
Nd3 h4 35. f4 exf4+ 36. gxf4 g4 37. f5 g3 38. Rg2 h3 39. Rxg3 Rxg3+ 40. hxg3
Nd7 41. Kf2 Bb7 42. Kg1 Re8 43. e5 fxe5 44. Nxe5+ Nxe5 45. Rxe5 Rxe5 46. Bxe5
c5 47. Kh2 Be4 48. g4 Bxc2 49. Kxh3 Ke8 50. Kg3 Kd7 51. Kf4 Bb1 52. a3 Kc6 53.
g5 a5 54. Bc3 Kd5 55. g6 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Gomez, Frank"]
[Result "1/2-1/2"]
[ECO "E71"]
[WhiteElo "2325"]
[BlackElo "2210"]
[PlyCount "83"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. h3 c5 6. dxc5 Qa5 7. Bd3 Qxc5 8. Be3
Qa5 9. Nf3 Nc6 10. Qd2 O-O 11. Rc1 Be6 12. b3 Rfc8 13. Nd5 Qxd2+ 14. Bxd2 Nd7
15. O-O Bxd5 16. exd5 Nd4 17. Nxd4 Bxd4 18. Rfe1 Re8 19. Kf1 f6 20. f4 Kf7 21.
Re2 a6 22. b4 Rac8 23. Re4 Ba7 24. Bc2 f5 25. Ree1 Nf6 26. Bd3 Bd4 27. a4 h5
28. a5 Rc7 29. Re6 Rec8 30. Rce1 h4 31. Ke2 Nh5 32. Kf3 Ng7 33. R6e2 Nh5 34.
Rc1 Nf6 35. Rce1 Nh5 36. Rc1 Nf6 37. Be1 Rh8 38. Bf2 Bxf2 39. Kxf2 Rhc8 40.
Rce1 Ng8 41. Rc2 Nf6 42. Rce2 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "2"]
[White "Garcia, Luis E"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "2375"]
[BlackElo "2325"]
[PlyCount "83"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 c5 5. e4 d6 6. Nge2 Nc6 7. O-O O-O 8. h3
Ne8 9. f4 Nc7 10. d3 Ne6 11. f5 Ned4 12. g4 Rb8 13. Bg5 b5 14. Rb1 bxc4 15.
dxc4 h6 16. Be3 Nxe2+ 17. Qxe2 g5 18. h4 Bxc3 19. bxc3 Rxb1 20. Rxb1 f6 21.
hxg5 hxg5 22. Qd2 Rf7 23. Bxc5 Qc7 24. Bd4 Rh7 25. Bf1 Rh4 26. Qg2 Ne5 27. Be2
Bb7 28. c5 dxc5 29. Bxe5 fxe5 30. Qg3 Bxe4 31. Bc4+ Kh7 32. Re1 Qc6 33. Kf2
Bxf5 34. Qxe5 e6 35. gxf5 Rxc4 36. Qxe6 Rf4+ 37. Ke3 Qxe6+ 38. fxe6 Kg7 39. e7
Kf7 40. Rg1 Kxe7 41. Rxg5 Ra4 42. Rxc5 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Acosta, Alejandro"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2325"]
[PlyCount "52"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Qxd4 e6 6. Bc4 Nc6 7. Qe4 Nb6 8. Bb3
d6 9. exd6 Bxd6 10. Nf3 Nd7 11. Bg5 Qb6 12. Nbd2 Nc5 13. Qe2 Be7 14. Bxe7 Nxe7
15. Nc4 Qc7 16. Bc2 Nd5 17. Qe5 Qxe5+ 18. Nfxe5 O-O 19. O-O-O b6 20. Nd6 f6 21.
Nd3 Rd8 22. Nxc5 Rxd6 23. Ne4 Rd7 24. Rhe1 Ba6 25. Bb3 Rad8 26. g3 Kf7 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "4"]
[White "Gutierrez Castillo, Jose Antonio"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C60"]
[WhiteElo "2370"]
[BlackElo "2325"]
[PlyCount "115"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. d4 Nxd4 5. Nxd4 exd4 6. Qxd4 Qf6 7. Be3 Bg7 8.
c3 Qxd4 9. cxd4 Ne7 10. Nc3 O-O 11. O-O c6 12. Bc4 d6 13. Rac1 b5 14. Bb3 a6
15. Rfd1 Bb7 16. Bg5 Rae8 17. a3 Nc8 18. f3 Kh8 19. f4 f5 20. e5 d5 21. Na2 Nb6
22. Nb4 Nc4 23. Nd3 Bc8 24. a4 Rf7 25. Ra1 Ra7 26. a5 Bf8 27. Kf2 Be6 28. Bc2
b4 29. Ba4 Rc8 30. Rdc1 Rac7 31. Ke2 Kg8 32. Bh4 Kf7 33. Be1 Rb7 34. b3 Nxa5
35. Nc5 Rb6 36. Nd3 Ke8 37. Rc2 Kd7 38. Rac1 Nb7 39. Bh4 a5 40. h3 Ra6 41. Kf3
h5 42. Bf6 Bf7 43. Ne1 Be8 44. g4 Ke6 45. gxh5 gxh5 46. Ke3 Nd6 47. Nf3 Ne4 48.
Ng5+ Nxg5 49. fxg5 Kd7 50. Kf4 Ke6 51. Bb5 Rb6 52. Bd3 Bg6 53. Ra2 Ra8 54. Rca1
c5 55. dxc5 Bxc5 56. Rxa5 Rxa5 57. Rxa5 Bg1 58. Ra7 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Alzate, Dario"]
[Result "1-0"]
[ECO "A81"]
[WhiteElo "2325"]
[PlyCount "82"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 e6 2. Nf3 f5 3. g3 Nf6 4. Bg2 Bb4+ 5. c3 Bd6 6. Nbd2 Nc6 7. Qc2 O-O 8. e4
fxe4 9. Nxe4 b6 10. Nfg5 Qe7 11. Be3 Rb8 12. Rd1 Ba6 13. b3 g6 14. Nxf6+ Rxf6
15. Ne4 Rf5 16. g4 Rf7 17. g5 Qf8 18. h4 Ne7 19. h5 Bb7 20. hxg6 Nxg6 21. d5
exd5 22. Nf6+ Rxf6 23. gxf6 Qxf6 24. Bxd5+ Bxd5 25. Rxd5 Be5 26. Rxd7 Bxc3+ 27.
Kf1 Nf8 28. Rxc7 Be5 29. Rxa7 Rd8 30. Rg1+ Ng6 31. Bg5 Qf3 32. Bxd8 Qh3+ 33.
Ke2 Qh5+ 34. Ke1 b5 35. Bg5 Qh3 36. Be3 Qe6 37. Rc7 Bxc7 38. Qxc7 Qe4 39. Qb8+
Kf7 40. Qc7+ Ke8 41. Qb8+ Kf7 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "6"]
[White "Herrera, Gabriel"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C69"]
[WhiteElo "2285"]
[BlackElo "2325"]
[PlyCount "42"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6 6. d4 Bg4 7. dxe5 Qxd1 8.
Rxd1 fxe5 9. Rd3 Bd6 10. Nbd2 Ne7 11. Nc4 Ng6 12. h3 Bxf3 13. Rxf3 Rf8 14.
Nxd6+ cxd6 15. Rd3 Kd7 16. Be3 Nf4 17. Rd2 Kc7 18. Rad1 Rad8 19. Bxf4 Rxf4 20.
f3 Rf6 21. c4 c5 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Betancourt, David"]
[Result "1-0"]
[ECO "D94"]
[WhiteElo "2325"]
[BlackElo "2350"]
[PlyCount "61"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. e3 O-O 6. cxd5 Nxd5 7. Bc4 Nb6 8.
Bb3 Na6 9. O-O c5 10. Qe2 e6 11. Rd1 Qe7 12. e4 cxd4 13. Nxd4 e5 14. Ndb5 Nc7
15. Nxc7 Qxc7 16. Bg5 Bd7 17. Rac1 Qb8 18. a4 h6 19. Be7 Re8 20. Bd6 Qd8 21. a5
Nc8 22. Ba3 Qg5 23. Bxf7+ Kxf7 24. Rxd7+ Kg8 25. Rcd1 Ne7 26. Rxb7 Kh8 27. Rdd7
Bf8 28. g3 Rac8 29. Kg2 Qf6 30. Bxe7 Rxe7 31. Rxe7 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "8"]
[White "Gutierrez, Ramon"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B01"]
[BlackElo "2325"]
[PlyCount "57"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 d5 2. exd5 Nf6 3. Nf3 Nxd5 4. d4 Bg4 5. Be2 e6 6. h3 Bh5 7. Ne5 Bxe2 8.
Qxe2 Nd7 9. O-O Be7 10. c4 N5f6 11. Nc3 O-O 12. Bg5 Nxe5 13. dxe5 Nd7 14. Bf4
Nc5 15. Rad1 Qe8 16. Qg4 f5 17. exf6 Rxf6 18. Bxc7 Qc6 19. Bg3 Rg6 20. Qe2 a5
21. Rfe1 Rf8 22. Nd5 Bg5 23. h4 exd5 24. cxd5 Qf6 25. hxg5 Qxg5 26. Qe7 Qxe7
27. Rxe7 Rd8 28. d6 Re6 29. Rd5 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Gonzalez, Gonzalo"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "2325"]
[PlyCount "171"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Bc4 Nf6 5. Bg5 O-O 6. Qe2 Nc6 7. O-O-O e5 8.
dxe5 Nxe5 9. Bb3 h6 10. Bh4 g5 11. Bg3 Qe7 12. Nf3 Bd7 13. Nxe5 dxe5 14. h4 g4
15. h5 a5 16. a3 c6 17. Bh4 b5 18. Rd3 b4 19. Nb1 a4 20. Bc4 bxa3 21. Nxa3 Rfb8
22. Rhd1 Be6 23. Bxe6 Qxe6 24. Nc4 Rb4 25. Rc3 Ne8 26. Bd8 Rab8 27. Ba5 R4b5
28. Rg3 Rc5 29. b3 axb3 30. cxb3 Qe7 31. Kc2 Nf6 32. Bc3 Nxh5 33. Rxg4 Qb7 34.
Rb1 Nf4 35. Rxf4 exf4 36. Qg4 Rg5 37. Qxf4 Bxc3 38. Kxc3 Qb4+ 39. Kc2 Rxg2 40.
Qf3 Rg5 41. e5 Qc5 42. Rd1 Qa7 43. Kb2 Ra8 44. Kc3 Rg6 45. Qf5 Qe7 46. Rd7 Qe6
47. Qxe6 fxe6 48. Nd2 Rf8 49. Ne4 Rf3+ 50. Kc4 Rg4 51. Rd4 Kg7 52. Kc5 Kg6 53.
Rc4 Rxb3 54. Kxc6 h5 55. Kd7 Kf5 56. Nd6+ Kxe5 57. Rc5+ Kf6 58. Rxh5 Rg7+ 59.
Kc6 Rc3+ 60. Kb5 Ke7 61. Ne4 Rc2 62. Rh4 Rg1 63. Rh7+ Kf8 64. Nc5 Rb1+ 65. Kc6
Rbc1 66. Rh5 Kf7 67. f4 Rc4 68. Kb5 Rxf4 69. Rh7+ Kg6 70. Re7 Rxc5+ 71. Kxc5
Kf6 72. Re8 Ke5 73. Rh8 Ke4 74. Kd6 e5 75. Rh1 Rf6+ 76. Kc5 Rf2 77. Kd6 Rf6+
78. Kc5 Rf2 79. Kd6 Re2 80. Rf1 Kd3 81. Rd1+ Kc2 82. Rd5 e4 83. Ke5 Kc3 84. Rd8
Re1 85. Rd7 e3 86. Ke4 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Agudelo, Antonio"]
[Result "1/2-1/2"]
[ECO "B19"]
[WhiteElo "2325"]
[BlackElo "2345"]
[PlyCount "29"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. h4 h6 8. h5
Bh7 9. Bd3 Bxd3 10. Qxd3 Qc7 11. Bd2 e6 12. O-O-O Ngf6 13. Ne4 O-O-O 14. g4
Nxe4 15. Qxe4 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "11"]
[White "Henao, Raul Fernando"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C61"]
[WhiteElo "2320"]
[BlackElo "2325"]
[PlyCount "59"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. O-O c6 6. Bc4 Nf6 7. Re1 d6 8.
c3 Ng4 9. Be2 h5 10. d3 Qh4 11. Bxg4 hxg4 12. Bf4 dxc3 13. bxc3 Be7 14. d4 Bd7
15. Nd2 Bg5 16. Bg3 Qh6 17. Nf1 Bf4 18. e5 O-O-O 19. Qa4 Bxg3 20. fxg3 Kb8 21.
Rab1 Bf5 22. Rb2 Ka8 23. Re3 dxe5 24. Rxe5 Qc1 25. Qb4 Bc8 26. Re7 Rxh2 27. Rb1
Qxb1 28. Qxb1 Rh6 29. Rxf7 Rdh8 30. Qb4 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "B42"]
[WhiteElo "2325"]
[BlackElo "2385"]
[PlyCount "64"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6 6. O-O Bg7 7. Be3 Nc6 8.
Nxc6 bxc6 9. c3 Ne7 10. Nd2 O-O 11. Qe2 d5 12. Bc5 Re8 13. e5 Nf5 14. Nf3 Bb7
15. Rfe1 a5 16. a4 Bf8 17. Bxf8 Kxf8 18. Bxf5 exf5 19. Qe3 Kg7 20. b4 Qe7 21.
Qc5 axb4 22. Qxe7 Rxe7 23. cxb4 Rae8 24. Reb1 f6 25. exf6+ Kxf6 26. Rd1 Re2 27.
Nd4 Rb2 28. b5 cxb5 29. axb5 Rb4 30. f3 Rc8 31. Nc6 Rxb5 32. Na7 Rbc5 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "13"]
[White "Zapata, Alonso"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C70"]
[WhiteElo "2375"]
[BlackElo "2325"]
[PlyCount "119"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5 6. O-O d6 7. c3 Nxb3 8. axb3
Bb7 9. d3 Nf6 10. Na3 Be7 11. Nc2 O-O 12. Bg5 Nh5 13. Bxe7 Qxe7 14. Ne3 g6 15.
Ne1 Qg5 16. Nf3 Qe7 17. b4 Kh8 18. g3 f5 19. exf5 Ng7 20. Nh4 gxf5 21. Neg2 f4
22. d4 e4 23. d5 Qg5 24. Qd2 Nh5 25. Qd4+ Qe5 26. Rad1 Rae8 27. b3 Bc8 28. c4
Bh3 29. Rfe1 e3 30. fxe3 f3 31. Nf4 Nxf4 32. gxf4 Qxd4 33. Rxd4 Bg4 34. Kf2
bxc4 35. bxc4 Rb8 36. Rb1 Bf5 37. Nxf5 Rxf5 38. Kxf3 Rg8 39. Rd2 Rh5 40. Re2
Rh3+ 41. Ke4 Re8+ 42. Kd4 Rf3 43. Kd3 h5 44. Ra1 Ra8 45. Rg1 Rb8 46. Rg3 Rxg3
47. hxg3 Kh7 48. Ra2 Kg6 49. Rxa6 Kf5 50. Ra7 Kg4 51. Rxc7 Kxg3 52. Rg7+ Kf3
53. Rh7 Re8 54. Rxh5 Rxe3+ 55. Kc2 Ke4 56. f5 Rf3 57. Rh4+ Kxf5 58. Rd4 Re3 59.
Rd3 Re8 60. Kc3 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Sanchez, Luis Augusto"]
[Result "1/2-1/2"]
[ECO "C28"]
[WhiteElo "2325"]
[BlackElo "2240"]
[PlyCount "23"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Bb4 5. Nge2 d6 6. O-O h6 7. a3 Ba5 8. b4
Bb6 9. Na4 O-O 10. Nxb6 axb6 11. Bb2 Be6 12. Ng3 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "15"]
[White "Gonzalez Rodriguez, Jorge Armando"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E61"]
[WhiteElo "2310"]
[BlackElo "2325"]
[PlyCount "31"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 c5 5. e3 O-O 6. Nge2 Nc6 7. O-O d6 8. d4
Bd7 9. b3 Rb8 10. Bb2 b6 11. Qd2 Qc8 12. Rfe1 a6 13. Rac1 Re8 14. e4 Nxd4 15.
Nxd4 cxd4 16. Qxd4 1/2-1/2

[Event "Cuba-America m"]
[Site "telex"]
[Date "1979.??.??"]
[Round "?.4"]
[White "De Greif, Boris"]
[Black "Fernandez, Juan C"]
[Result "0-1"]
[ECO "A30"]
[WhiteElo "2325"]
[BlackElo "2385"]
[PlyCount "67"]
[EventDate "1979.??.??"]
[EventType "team"]
[EventRounds "1"]
[EventCountry "CUB"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[WhiteTeam "US of America"]
[BlackTeam "Cuba"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "CUB"]

1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. c4 Nf6 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4
O-O 9. b3 a6 10. Bb2 d6 11. Rfd1 Nbd7 12. Ne1 Qc7 13. Rac1 Bxg2 14. Nxg2 Qb7
15. Ne3 b5 16. Nb1 Rfc8 17. Nd2 Ne5 18. Qf4 Nfd7 19. Qe4 Qb8 20. Qb1 f5 21.
cxb5 Rxc1 22. Rxc1 axb5 23. Nc2 b4 24. Nd4 Nc5 25. f4 Ng4 26. Nc6 Qb7 27. Nxe7+
Qxe7 28. Bd4 Nf6 29. Qc2 Nd5 30. e4 Nc3 31. Bxc3 bxc3 32. Qxc3 fxe4 33. a4 Nd3
34. Rf1 0-1