[Event "Obstruccion"]
[Site "?"]
[Date "2007.08.11"]
[Round "5"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2547"]
[BlackElo "2341"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "r4r1k/3n1pp1/2pp1q1p/p4P2/Pp1pPQR1/1B1P1P1R/1PP4P/7K w - - 0 24"]
[PlyCount "1"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Pocas piezas defienden al rey. ¿Como aprovecharías este motivo
mediante un tema de combinación? ","","",Rg6,"",10]} 24. Rg6 $3 $18 {
Obstrucción} (24. Rg6 Qxg6 25. fxg6 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2008.03.20"]
[Round "2"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2202"]
[BlackElo "2509"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "6k1/pb1qrp2/1p1b4/3p3n/3P3p/P4P2/1P4QP/R1B2K1R b - - 0 26"]
[PlyCount "1"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey blanco esta indefenso, busca como aprovechar este motivo.","",
"",Ng3+,"",10]} 26... Ng3+ $1 {Obstrucción} (26... Ng3+ 27. hxg3 Qb5+ 28. Kg1
Re1+ 29. Kh2 Bxg3+) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2008.03.25"]
[Round "1"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2579"]
[BlackElo "2084"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "1rb1r1k1/5p1p/pp1ppQp1/2q5/P3P3/2N5/1PP1N1BP/R1B4K w - - 0 27"]
[PlyCount "1"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Las casillas oscura del flanco rey negro se encuentran debilitas. Como
aprovechar esta deficiencia.","","",Nd5,"",10]} 27. Nd5 $1 {obstrucciòn} (27.
Nd5 Qf2 28. Qxf2 exd5 29. Bh6 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2008.08.06"]
[Round "5"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2592"]
[BlackElo "2599"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "7k/p2q2bp/1p4p1/2Q5/P1B2B2/1P4P1/2n2P1P/R5K1 w - - 0 38"]
[PlyCount "1"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Las negras amenazan recuperar la torre. Busca comno impedir a las
negras recuperar la torre de menos.","","",Qe5,"",10]} 38. Qe5 $1 {Obstruccion}
(38. Qe5 Bxe5 39. Bxe5+ Qg7 40. Bxg7+ Kxg7 41. Rd1 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2007.12.16"]
[Round "5"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2508"]
[BlackElo "2000"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "3r3r/qpkb4/3np3/n1Npp2p/1Q4p1/N1P5/P3BPPP/1R3RK1 w - - 0 25"]
[PlyCount "1"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro no tiene suficiente seguridad. ¿Busca los medios para
aprovechar este motivo?","","",Na6+,"",10]} 25. Na6+ $3 {Obstruccion} (25. Na6+
bxa6 26. Qxa5+ Kc6 27. c4 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2007.03.23"]
[Round "1.4"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2618"]
[BlackElo "2474"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "5rk1/pppq1ppp/1n1br3/n3pNB1/6Q1/2PP3P/PPB2PP1/R3R1K1 w - - 0 21"]
[PlyCount "1"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{Bloqueo ["El rey negro solo puede ser defendido por la torre de e6. Como
aprovechar esa deficiencia tactica.","","",Bf6,"",10]} 21. Bf6 $3 (21. Bf6 Rxf6
22. Qxg7#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2010.01.14"]
[Round "6"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2577"]
[BlackElo "2284"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2r3k1/3R1ppp/1p2p3/p5b1/Q1q5/5BP1/PP3P1P/6K1 w - - 0 30"]
[PlyCount "1"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["En esta posición se une el debilitamiento de la 8va y pieza
sobrecargada. Utiliza el tema de combinación correcto para aprovechar el
motivo de combinación presente en la posición.","","",Rd8+,"",10]} 30. Rd8+
$3 {Bloqueo} (30. Rd8+ Rxd8 31. Qxc4 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2007.01.28"]
[Round "13"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2766"]
[BlackElo "2683"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "1q5k/1b5r/p3N1Q1/1pr5/4P3/1P1B4/P5PP/3R2K1 w - - 0 40"]
[PlyCount "1"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{Bloqueo ["Las negras amenazan Dxh2 Como defender la amenaza y atacar",
"","",e5,"",10]} 40. e5 $1 {Temático: liberación de d3-g6. . . . .} (40. e5
Rcc7 41. Qf6+ Rhg7 42. Qh4+ Kg8 43. Bh7+ Rxh7 44. Rd8+ Qxd8 45. Qxd8+ Kf7 46.
Nxc7 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2010.01.16"]
[Round "3"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2593"]
[BlackElo "2234"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "rnb3k1/ppq1p2p/6p1/2pP4/4Pr2/2RB1N2/P2Q1PPP/4K2R w K - 0 15"]
[PlyCount "1"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Las piezas cuando solo son defendidas por una piezas esto puede
acarrear problemas tacticos. Utiliza el tema de combinación correcto para
aprovechar el motivo de combinación presente en la posición.","","",d6,"",10]
} 15. d6 $1 {Bloqueo} (15. d6 exd6 16. Qxf4 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2010.11.13"]
[Round "4"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2345"]
[BlackElo "2419"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2r3rk/1bq2p1p/p4RpQ/2bp1N2/8/2PB4/1P4PP/1K2R3 w - - 0 29"]
[PlyCount "3"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro no tiene suficiente casillas para moverse. En la presente
posición busca como aprovechar el motivo combinatorio","","",Re7,"", 10]} 29.
Re7 $3 {Obstruccion} gxf5 (29... Bxe7 30. Rxf7) 30. Rfxf7 (30. Rfxf7 Qxe7 31.
Qxh7#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2008.03.21"]
[Round "2"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2531"]
[BlackElo "2209"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "3q1rk1/2p2ppp/np3b2/r2P4/p1QP1B2/P4N2/1P3PPP/R3R1K1 w - - 0 17"]
[PlyCount "3"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Las piezas semi-desprotegida al igual que las piezas indefensas se
prestan para combinaciones. ¿Busca como aprovechar este motivo?","","",d6,"",
10]} 17. d6 $1 $18 {Obstrucción} cxd6 18. Bd2 (18. Bd2 d5 19. Qc2 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2007.08.07"]
[Round "5"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2493"]
[BlackElo "2624"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "3r1rk1/1p4p1/pb1q3p/4B3/2P4P/PP5N/6Q1/2K1R3 b - - 0 33"]
[PlyCount "3"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["La primera horizontal esta debilitada. ¿Como aprovechar este motivo?",
"","",Be3+,"",10]} 33... Be3+ $1 {Obstruccion} 34. Kb1 (34. Rxe3 Qd1+ 35. Kb2
Rd2+ $19) 34... Qxe5 (34... Qxe5 35. c5 Qc3 $19) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2008.03.26"]
[Round "2"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2245"]
[BlackElo "2579"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2r2rk1/5ppp/p2Rp3/2n5/2P1b3/N3QB2/Pq4PP/2R3K1 b - - 0 23"]
[PlyCount "3"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["La dama blanca esta sobrecargada defendiendo dos piezas. Como
aprovechar este motivo tema para crear una combinacion.","","",Nd3,"",10]}
23... Nd3 $1 {Obstrucciòn} 24. Rxa6 (24. Rxd3 Bxd3 {Combination}) 24... Bxf3 (
24... Bxf3 25. gxf3 Qxc1+ 26. Qxc1 Nxc1 $19) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2008.01.18"]
[Round "10"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2099"]
[BlackElo "2437"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2b2r1k/p5pp/6r1/3P1p2/N1P1nP1q/1B3Q1P/PP3nPK/3RR3 b - - 0 29"]
[PlyCount "3"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey blanco dispone de pocas casillas para moverse, ademas pocas
piezas lo protegen. Busca como aprovechar estos elementos para atacar al rey.
","","",Rg3,"",10]} 29... Rg3 {Obstrucción} 30. Qe2 Rxh3+ $1 (30... Rxh3+ 31.
gxh3 Qg3#) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2008.01.24"]
[Round "3"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2348"]
[BlackElo "2064"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "3r1r2/pBQbRnnk/3q2pp/3N1p2/5N1P/1P4P1/P4P2/4R1K1 w - - 0 34"]
[PlyCount "3"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro dispone de pocas casillas para moverse, ademas su escudo
de peones estan vulnerables. Busca como aprovechar estos elementos para montar
un ataque al rey.","","",R1e6,"",10]} 34. R1e6 $3 {Obstrucción} Qxc7 (34...
Bxe6 35. Nf6+) (34... Nxe6 35. Nf6+) 35. Nf6+ (35. Nf6+ Kh8 36. Nxg6#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2008.01.03"]
[Round "3"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2361"]
[BlackElo "2521"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2b1kr2/6Q1/r1p1p2p/p1q1Np2/5P2/P2R3P/1P4PK/8 w - - 0 33"]
[PlyCount "3"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro dispone de pocas casillas para moverse y se encuentra
debilitada su posición Busca como aprovechar estos elementos para atacar al
rey.","","",Rd7,"",10]} 33. Rd7 $1 {Obstrucción} Qxe5 (33... Bxd7 34. Qxd7#)
34. Qe7# 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2006.01.03"]
[Round "2"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2262"]
[BlackElo "2034"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "1r2r1k1/p2n1pBp/2p2Pp1/2qpp3/4P2Q/1pPP1R2/P3B2P/R5K1 w - - 0 24"]
[PlyCount "3"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro no tiene casillas donde moverse. Las negras estan dando
jaque, utiliza un tema de combinacion para rematar la posicion","","",d4,
"Bloqueo",10]} 24. d4 {Bloqueo} exd4 25. Qxh7+ $3 (25. Qxh7+ Kxh7 26. Rh3+ Kg8
27. Rh8#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2009.08.26"]
[Round "6"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2507"]
[BlackElo "2556"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "3r1b1k/p6p/1pr2p1P/4pQ2/6R1/2P1B1R1/qP4P1/6K1 w - - 0 32"]
[PlyCount "5"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro no tiene casillas para moverse. Trata de aprovechar la
afirmación anterior.","","",c4,"",10]} 32. c4 $1 {Obstruccion} Bc5 (32... Rxc4
33. Rg8#) 33. Rg7 (33. Qd7 Qa1+ 34. Kh2 Qg1+ 35. Bxg1 Be7 36. Qxe7 Rxc4 37.
Qxd8#) 33... Bxe3+ (33... Qb1+ 34. Qxb1 Bxe3+ 35. Kh1 f5 36. Rxh7+ Kxh7 37.
Qxf5+ Kh8 38. Qxe5+ Rf6 39. Qxf6+ Kh7 40. Qg7#) 34. Kh2 (34. Kh2 Bg1+ 35. Kh1
Qxb2 36. Rxh7#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2009.04.09"]
[Round "7"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2450"]
[BlackElo "2549"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "r1b4r/5pkp/p2Npbp1/4q3/4P3/4B3/PP2Q1PP/2RR2K1 w - - 0 23"]
[PlyCount "5"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro no dispone de suficiente casillas para moverse. Busca por
medio de un tema de combinación la soluciòn para ganar material.","","",
Bh6+,"",10]} 23. Bh6+ $3 {Obstruccion} Kg8 (23... Kxh6 24. Nxf7+ {Ataque doble}
) 24. Nxc8 g5 25. Qd2 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2009.03.31"]
[Round "8"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2445"]
[BlackElo "2673"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "8/p1pkr2p/5R2/3P2p1/6P1/P2pb1B1/1P1pr1PK/3R4 b - - 0 35"]
[PlyCount "5"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Los peones pasados son un elemento importante en la estrategia como en
la táctica. En esta posición busca como sacar provecho al peón pasado de d2.
", "","",Re1,"",10]} 35... Re1 $1 {Obstrucción} 36. Bxe1 (36. Rxe1 dxe1=Q 37.
Bxe1 Bg1+ 38. Kxg1 Rxe1+ 39. Kf2 d2 $19) (36. Bxe1 Bg1+ 37. Kxg1 dxe1=Q+ 38.
Rxe1 Rxe1+ 39. Rf1 d2 $19) 36... Bg1+ $3 (36... dxe1=B $6 37. Rxd3 a5 38. Kh3
$17) 37. Kxg1 dxe1=Q+ (37... dxe1=Q+ 38. Rf1 Qg3 $19) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2008.01.11"]
[Round "3"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[BlackElo "1606"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "rnq3r1/pp3Nb1/2pP2k1/6p1/4p1P1/1Q2P3/PP3P2/2KR3R w - - 0 28"]
[PlyCount "5"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro dispone de pocas casillas para moverse. ¿Como aprovechar
este motivo?","","",d7,"",10]} 28. d7 $1 {Obstrucción} Qc7 (28... Nxd7 29.
Qe6+) 29. Qe6+ Bf6 30. Rh6+ (30. Rh6+ Kg7 31. Qxf6+ Kf8 32. Nxg5#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2008.04.30"]
[Round "9"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2673"]
[BlackElo "2531"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "5rk1/2q1bp1p/r2pp2Q/p3n1P1/Np1Nb3/1P5R/P1P4P/1KB2R2 w - - 0 30"]
[PlyCount "6"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro esta debilitado. Como organizar el ataque al rey.","","",
g6,"Obstrucción",10]} 30. g6 $1 {Obstrucción} Bxg6 (30... Nxg6 31. Qxh7# {
Mate attack}) (30... fxg6 31. Qxh7# {Mate attack}) (30... hxg6 31. Qh7# {Mate
attack}) 31. Rg1 Bg5 32. Rxg5 f6 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2009.05.28"]
[Round "5"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2038"]
[BlackElo "2348"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "4rbk1/Qp3ppp/6r1/pN6/P4Pn1/1P2BbNq/2PR3P/4R1K1 b - - 0 31"]
[PlyCount "5"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey blanco se encuentra debilitado. Utiliza el tema de combinación
adecuado para aprovechar el motivo combinatorio en esta posición.","","",Nf2,
"",10]} 31... Nf2 $3 {Bloqueo} 32. Rxf2 (32. Bxf2 Qg2#) (32. Kxf2 Qg2#) 32...
Rxg3+ 33. hxg3 Qh1# 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2008.08.09"]
[Round "9"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2568"]
[BlackElo "2321"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "r5kr/pp1Bb2p/1q2pppB/n2nN3/3P4/5Q2/PP3PPP/R4RK1 w - - 0 24"]
[PlyCount "7"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro se encuentra debilitado. ¿Como aprovechar este motivo?",
"","",Nc6,"",10]} 24. Nc6 $3 {Obstrucción} Kf7 (24... Nxc6 25. Bxe6#) (24...
bxc6 25. Bxe6#) 25. Bxe6+ $1 Kxe6 26. Rfe1+ Kd6 27. Nxe7 (27. Nxe7 Nb4 (27...
Nxe7 28. Qxf6+ Kd7 (28... Kd5 29. Re5+ Kc4 30. Rc1+ Kb4 31. Bd2+ Ka4 32. Rxa5+
Qxa5 33. b3+ Kb5 34. Rc5#) 29. Rxe7+ $18) 28. Qxf6+ Kd7 29. Qf7 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2008.03.30"]
[Round "6"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2551"]
[BlackElo "2202"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "r4r1k/1bp3q1/pp1pB1p1/4n1Q1/P2pP1N1/7P/1PP3P1/R4RK1 w - - 0 23"]
[PlyCount "7"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro no tiene suficente defensa. Como aprovecar este motivo
combinatorio.","","",Nf6,"Obstrucción",10]} 23. Nf6 $1 {Obstrucción} Rxf6 (
23... Nf7 24. Bxf7 Rxf7 25. Qh4+ Qh7 26. Nxh7 Rxh7 27. Qf6+ Rg7 28. e5 $18) 24.
Rxf6 Qe7 (24... Qh7 25. Raf1 Bxe4 26. Rf8+ Rxf8 27. Rxf8+ Kg7 28. Qf6+ Kh6 29.
Rh8 Nf3+ 30. Kf2 d3 31. gxf3 Qxh8 32. Qxh8+ Kg5 33. Ke3 dxc2 34. h4#) 25. Qh6+
Qh7 26. Rf8+ (26. Rf8+ Rxf8 27. Qxf8+ Qg8 28. Qxg8#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2009.03.24"]
[Round "1"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2249"]
[BlackElo "2639"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "4rrk1/6pp/6q1/p1pb4/5n2/1NP1B3/PR1Q2PP/4R1K1 b - - 0 31"]
[PlyCount "7"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Los puntos de coibncidencia son peligroso en la tactica., ademas las
piezas negras se encuentran bien coordinadas. Utiliza el tema de combinacion
adecuado para sacar ventaja al enunciado anterior.","","",Nh3+,"Obstrucción",
10]} 31... Nh3+ {Obstrucción} 32. Kh1 Nf2+ 33. Qxf2 Rxf2 34. Rxf2 Rxe3 $1 (
34... Rxe3 35. Ref1 h5 36. Nxa5 Rxc3 $19) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2007.06.08"]
[Round "2"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2553"]
[BlackElo "2311"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "Q7/2r1p2k/4R3/1pqn1p1p/7P/1P6/P1P2Pr1/1K1NR3 w - - 0 27"]
[PlyCount "8"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro esta debilitado, pero las negras tienen fuerte amenaza
sobre c2. Busca un tema de combinación para atacar al rey negro.","Bloqueo",
"",c4,"",10]} 27. c4 $1 $18 {Bloqueo} bxc4 (27... Nf4 28. Ne3 Rc8 $18) 28. Qf8
Rg7 (28... Nf6 29. Rxe7+ Qxe7 30. Rxe7+ Rxe7 31. Qxe7+ Kg6 $18) 29. Rg1 $3 Nc3+
(29... Rxg1 30. Rh6#) 30. Ka1 Qd4 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2008.08.17"]
[Round "8"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2509"]
[BlackElo "2540"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "r5k1/1bP2ppp/pn1r1q2/3p4/3N4/1QR1P2P/5PP1/2R2BK1 w - - 0 31"]
[PlyCount "7"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Cuando existen piezas indefensas los temas de combinacion se utilizan
para ganar una de ellas, en esta posicion existe el tema del peon pasado, que
puede ayudar a obtener ventaja material","","",Rc6,"",10]} 31. Rc6 $3 {
Obstruccion} Rxc6 (31... Bxc6 32. Qxb6) 32. Nxc6 Qd6 (32... Re8 33. Qxb6 Bc8
34. Bxa6 Bd7 $18) 33. Qxb6 Bc8 34. Qb8 (34. Qb8 Rxb8 35. cxb8=Q Qxb8 36. Nxb8
$18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2012.02.15"]
[Round "3.23"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2342"]
[BlackElo "1856"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "3r2k1/2R1b1pp/4r2q/pp2PQ2/4NP2/P3P2P/1P3P1K/R7 w - - 0 30"]
[PlyCount "7"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Las piezas semidesprotegidas son motivos de combinacion.","","",Nf6+,
"Bloqueo",10]} 30. Nf6+ $1 {Bloqueo} Rxf6 (30... Bxf6 31. Qxe6+) (30... gxf6
31. Qxe6+) 31. exf6 Bxf6 (31... Qxf6 32. Qxb5 Rd2 33. Qxa5 Rd8 $18) 32. Qe6+
Kh8 33. Rc8 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2008.05.29"]
[Round "1"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2549"]
[BlackElo "2292"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2rbk3/1p5p/p2p3q/3N4/P3P2P/7Q/2P5/5R1K w - - 0 34"]
[PlyCount "7"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro esta debilitado, por el momento la torre de c8 no puede
ser capturada por la captura en h5- Busca la manera de atacar el rey negro.",
"","",Nf6+,"Obstrucción",10]} 34. Nf6+ $3 {Obstrucción} Bxf6 35. Qe6+ Kd8 (
35... Kf8 36. Rxf6+ Qxf6 37. Qxf6+ Ke8 38. Qe6+ Kd8 39. Qxd6+ Ke8 40. Qe6+ Kd8
41. Qg8+ Kc7 42. Qxh7+ Kb8 $18) 36. Qxd6+ Ke8 37. Qe6+ (37. Qe6+ Be7 38. Qxh6
$18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2009.07.07"]
[Round "7"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2221"]
[BlackElo "2216"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "r3r1k1/7p/1pqp1Qp1/2p5/2P5/1pB3PP/1P4bK/4R3 b - - 0 31"]
[PlyCount "9"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Las blancas tienen un atsque mortasl sobre el rey negro a traves de la
diagonal a1-h8 Como pueden defenderse las piezas negras.","","",Re5,"",10]}
31... Re5 $1 {Obstrucción} 32. Rxe5 (32. Bxe5 dxe5) 32... dxe5 33. Qxe5 Kf7
34. Qg7+ Ke8 35. Bf6 (35. Qg8+ Kd7 36. Qf7+ Kc8 $19) 35... Qe6 (35... Qe6 36.
g4 Be4 $19) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2012.01.22"]
[Round "8"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2677"]
[BlackElo "2545"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2q1r1kb/2p1rp1p/6pP/1p2P3/1P3Qn1/1BP1R1N1/5P2/R5K1 w - - 0 31"]
[PlyCount "9"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Las piezas indefensas son motivo de combinación. ¿Como aprovechar el
motivo combinatorio presente en la posición?","","",e6,"Obstrucción",10]} 31.
e6 $1 {Obstrucción} f5 (31... fxe6 32. Qxg4) 32. Nxf5 $1 gxf5 33. Rg3 Be5 (
33... Bf6 $18) 34. Qxe5 Rf8 (34... c5 35. Qxf5 Kh8 36. Qxg4 $18) 35. Rxg4+ $1 (
35. Rxg4+ fxg4 36. Qg5+ Kh8 37. Qxe7 Rf7 38. exf7 g3 39. Qe5#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2006.02.18"]
[Round "1"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2365"]
[BlackElo "2541"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2r3k1/p5pp/4p1rb/3n1p1q/3P4/P1PQ3P/5P2/R2RBB1K b - - 0 29"]
[PlyCount "9"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El flanco rey esta debil, la columna 'g' se encuentra controlada por
la torre de g6, las casillas f3 y g2 estan debiles. Busca los medios a traves
de un tema de combinacion para aprovechar la posicion indefensa del rey blanco.
","Bloqueo","",Be3,"Bloqueo de casilla.",10]} 29... Be3 $1 {Bloqueo de casilla.
} 30. fxe3 (30. Qxe3 Nxe3 $19) 30... Qf3+ 31. Kh2 Nxe3 32. Bh4 {["","","",
Rg2+,"",10]} Rg2+ $1 {Bloqueo de casilla.} 33. Kh1 (33. Bxg2 Qxg2#) 33... Qxh3#
0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2007.01.15"]
[Round "6"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2264"]
[BlackElo "2345"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "5rk1/pp3p2/5Qp1/6R1/2P5/1P5P/2q1r1P1/5RK1 w - - 0 26"]
[PlyCount "9"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{Bolqueo ["El escudo de peones esta debil Pocas piezas defendiendo el
flanco rey. Busca como aprovechar estos elementos a traves de temas de
combiancion.","","",Rff5,"",10]} 26. Rff5 $18 Qd1+ (26... Rxg2+ {no hay nada
mejor en la posición} 27. Rxg2 Qc1+ 28. Kh2 Qh6 $18) 27. Kh2 Ree8 28. Rxg6+ $1
fxg6 (28... fxg6 29. Qxg6+) 29. Qxg6+ Kh8 30. Qh6+ (30. Qh6+ Kg8 31. Rg5+ Kf7
32. Rg7#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2007.08.06"]
[Round "3"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2494"]
[BlackElo "2618"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "4brk1/1p4p1/3np3/pP1pN3/P2Pn2q/3NPPp1/1Q6/2R2BK1 b - - 0 28"]
[PlyCount "11"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey esta debilitado. ¿Como aprovechar este motivo?","","",Nf2,"",
10]} 28... Nf2 $1 {Obstrucción} 29. Bg2 (29. Nxf2 Qh2#) 29... Nxd3 30. Nxd3
Bh5 31. f4 (31. Bh3 Bxf3 32. Rf1 Nc4 33. Rxf3 Nxb2 34. Rxf8+ Kxf8 $19) 31...
Nc4 32. Rxc4 dxc4 33. Ne5 (33. Nc5 Qh2+ 34. Kf1 Bg4 $19) 33... g5 (33... g5 34.
Bf3 gxf4 $19) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2009.03.28"]
[Round "2"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[BlackElo "2540"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "rr4k1/6b1/3p1nR1/2pP4/1q3P2/2N5/PP1Qb2P/2K3R1 b - - 0 24"]
[PlyCount "11"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Las piezas blancas atacan sobre el alfil de g7. Utiliza el tema de
combinacion adecuado para sacar ventaja al enunciado anterior.","","",Bg4,"",
10]} 24... Bg4 $1 {Obstruccion} 25. h3 (25. R1xg4 Nxg4) (25. R6xg4 Nxg4) 25...
Kf8 (25... Qd4 $142 26. Qxd4 cxd4 27. Rxg7+ Kxg7 $19) 26. hxg4 $2 (26. Rxg7
Kxg7 27. hxg4 Rxa2 28. Nxa2 Qxd2+ 29. Kxd2 Rxb2+ 30. Kc3 Rxa2 31. Re1 $19)
26... Ne4 27. Qc2 (27. Nxe4 Bxb2+ 28. Kd1 Qxe4 29. Re1 Qb1+ 30. Ke2 Qxg6 31.
Kf3 $19) 27... Bxc3 28. bxc3 Qa3+ 29. Kd1 Nxc3+ (29... Nxc3+ 30. Ke1 Rb1+ 31.
Qxb1 Nxb1 $19) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2008.05.11"]
[Round "5"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2165"]
[BlackElo "2013"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "r4k1r/1b2qp1p/pp2pnp1/4N3/2P1B3/6Q1/PP3PPP/3RR1K1 w - - 0 21"]
[PlyCount "17"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Las piezas indefensas son motivos de combinación. ¿Busca un tema
combinatorio para sacar provecho a la afirmación anterior?","","",Nd7+,"",10]
} 21. Nd7+ $3 {Obstrucción} Nxd7 22. Bxb7 Rd8 (22... Ra7 23. Qc7 Rxb7 24. Qxb7
$18) 23. Bxa6 (23. Qc7 Kg7 24. Bxa6 Qb4 $18) 23... Kg7 $2 (23... Nf6 24. Qe3
Kg7 25. Qxb6 Rb8 $18) 24. Qc7 Qb4 25. Rf1 Ra8 (25... Qc5 26. Rxd7 Qxc7 27. Rxc7
Ra8 $18) 26. Rxd7 Rxa6 (26... Rhf8 27. Qe5+ Kg8 $18) 27. Rxf7+ Kh6 28. Qf4+ Kh5
29. Qf3+ $18 (29. g4+ Kh4 30. Qh6+ Kxg4 31. h3#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2012.01.06"]
[Round "9.14"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2087"]
[BlackElo "2126"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "r1r2bk1/p1q2p1b/1np3pp/8/4R3/1B1N1QN1/1P3PPP/4R1K1 w - - 0 26"]
[PlyCount "11"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro esta debilitado. ¿Como aprovechar el motivo combinatorio
presente en la posición?","","",Re7,"obstrucción",10]} 26. Re7 $3 {
Obstrucción} Bxe7 (26... Qxe7 27. Rxe7) 27. Qxf7+ Kh8 28. Rxe7 Qxe7 29. Qxe7
Bg8 30. Qf6+ Kh7 31. Bf7 (31. Bf7 Bxf7 32. Qxf7+ Kh8 33. Ne5 $18) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2006.01.29"]
[Round "7"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "1-0"]
[WhiteElo "2297"]
[BlackElo "2294"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "5rk1/p1p1r2R/bpn1pqP1/3p1p1Q/3P1P1b/4PN2/PPPK2P1/7R w - - 0 21"]
[PlyCount "11"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["La casilla h8 es un punto de coinciadencia de las piezas blancas, pero
la dama negra defiende esa casilla. Utiliza el tema combinatorio adecuado para
aprovechar el debilitamiento del ey negro.","","",g7,"Bloqueo de casilla. ",10]
} 21. g7 $1 {Bloqueo de casilla.} Qxg7 (21... Rxg7 22. Rh8#) 22. Rxg7+ Rxg7 23.
Rxh4 Ne7 (23... Be2 24. Kxe2 Nd8 25. Qh8+ Kf7 26. Ne5+ Ke7 27. Qxg7+ $18) 24.
Qh8+ Kf7 25. Ne5+ Kf6 (25... Ke8 26. Qxg7 Rg8 27. Qf7+ Kd8 28. Qxe6 $18) 26.
Rh6+ (26. Rh6+ Ng6 27. Qxf8+ Rf7 28. Qxf7#) 1-0

[Event "Obstruccion"]
[Site "?"]
[Date "2008.05.13"]
[Round "2"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2247"]
[BlackElo "2603"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "1r3r2/5pkp/p2p4/3b4/1p5R/1n2Q3/1qP3P1/5RK1 b - - 0 28"]
[PlyCount "13"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El rey negro se encuentra debilitado. Busca como defender al rey negro
del ataque blanco.","","",Qxc2,"Bloqueo",10,Kh8,"",0]} 28... Qxc2 {Bloqueo} (
28... Kh8 29. Rf5 f6 30. Qd3 $19) 29. Qh6+ Kg8 30. Rg4+ Qg6 $1 31. Rg5 (31.
Rxg6+ fxg6) 31... Be4 32. Rf4 (32. Rf6 Nc5 33. Rgxg6+ Bxg6 34. Rxd6 b3 $19)
32... Nc5 33. Rh4 (33. Qh4 b3 34. Rxg6+ fxg6 35. Rxe4 Nxe4 36. Qxe4 b2 $19)
33... Qxg5 $1 34. Qxg5+ Bg6 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2007.04.18"]
[Round "8"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2485"]
[BlackElo "2424"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2r3k1/8/3qp1P1/p2n2P1/1n2Q2P/1P2P2K/1Bp5/5R2 b - - 0 34"]
[PlyCount "13"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["Esta posción es de doble filo, aunque las piezas negras tienen pieza
de ventaja, las dama blanca puede crear serias amenazas al rey negro por el
debilitamiento de su escudo de peones. Busca el camino para materializar la
ventaja haciendo uso de temas de combinación.","","",Nd3,"",10]} 34... Nd3 $3
$19 {Intercepción} 35. Qf3 (35. Qxd3 Nf4+ 36. Rxf4 Qxd3 $19) 35... N5f4+ $3 (
35... Nxb2 $4 36. Qf7+ Kh8 37. Qh7#) (35... Rf8 36. Qh5 $11) 36. exf4 Nxb2 37.
Qb7 (37. h5 Nd1 38. Qb7 Qc7 $19) 37... Rc3+ 38. Kh2 (38. Kg2 Qd2+ 39. Rf2 Qd5+
40. Qxd5 exd5 41. Rf1 $19) 38... Qd2+ 39. Kg1 (39. Qg2 {no mejora las cosas}
c1=Q 40. Rf2 Qxf4+ 41. Rxf4 Qxf4+ 42. Kh1 Rc1+ 43. Qg1 Qxh4+ 44. Kg2 Qg4+ 45.
Kf2 Rc2+ 46. Ke3 Re2#) 39... Rg3+ 40. Kh1 Rh3+ (40... Rh3+ 41. Kg1 Qh2#) 0-1

[Event "Obstruccion"]
[Site "?"]
[Date "2007.05.15"]
[Round "9"]
[White "Táctica -"]
[Black "- Obstruccion"]
[Result "0-1"]
[WhiteElo "2565"]
[BlackElo "2504"]
[Annotator "Chess Base"]
[SetUp "1"]
[FEN "2bqnr1k/6rp/pp1p4/4n3/2PR4/2N1Q1P1/PPN1B3/R5K1 b - - 0 25"]
[PlyCount "13"]
[EventDate "8.??.??"]
[Source "Inforchess"]
[SourceDate "2012.04.30"]

{["El escudo de peoens esta destrozado y la defensa es escasa. ¿Como
aprovechar estos motivos para rematar la posición utilizando temas de
combinación?","Intercepción","",Nf3+,"",10]} 25... Nf3+ $1 {Intercepción}
26. Bxf3 Rxg3+ 27. Kf2 Rfxf3+ 28. Qxf3 Rxf3+ 29. Kxf3 Qf6+ 30. Ke3 (30. Rf4
Bb7+ 31. Nd5 Qxb2 32. Re1 $19) 30... Bf5 31. Ne4 Qh6+ (31... Qh6+ 32. Kd3 Nf6
$19) 0-1