[Event "Ch USA"] [Site "masterchessopen.com San Diego (USA)"] [Date "2004.12.04"] [Round "9"] [White "Onischuk Alexander (USA)"] [Black "Gurevich Dmitry (USA)"] [Result "1-0"] [WhiteElo "2653"] [BlackElo "2499"] [ECO "E38"] [Opening "Nimzo-Indian: Classical, 4...c5"] { } 1.d4 { 1 } 1...Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 Bxc5 6.Nf3 Qb6 7.e3 Qc7 8.b3 a6 ( 8...O-O 9.Bb2 a6 10.Bd3 Be7 11.g4 Nc6 12.a3 g6 13.g5 Nh5 14.Ne4 d5 15.Ng3 Ng7 16.h4 Bd6 17.Ne2 Ne5 18.Nxe5 Bxe5 19.Nd4 dxc4 20.bxc4 Nh5 21.Nf3 Bxb2 22.Qxb2 b5 23.Qe5 Qa5+ 24.Ke2 Bb7 25.Rhd1 f6 26.gxf6 Rxf6 27.Ng5 Raf8 28.Rf1 { ...0-1, Gruenberg Hans-Ulrich 2510 - Fries-Nielsen Jens Ove 2425 , Berlin 1989 Memorial Em.Lasker } ) 9.Bb2 ( 9.g4 h6 10.Bb2 b6 11.Rg1 Bb7 12.Be2 d5 13.cxd5 Nxd5 14.Nxd5 Bxd5 15.Rc1 Bb4+ 16.Kf1 Qxc2 17.Rxc2 O-O 18.g5 h5 19.Ne5 g6 20.e4 Bb7 21.Rc7 Ra7 22.Nxg6 Re8 23.Nf4 Re7 24.Rxe7 Bxe7 25.g6 f6 26.Bc4 { 1-0, Bareev Evgeny 2719 - Sakaev Konstantin 2639 , Moscow 2001 Ch World FIDE (KO-system) (play-off) } ) 9...b6 { ?/= } 10.Be2 ( 10.Bd3 Bb7 11.Ne4 Bb4+ 12.Ke2 Be7 13.Nxf6+ gxf6 14.a3 Nc6 15.Rac1 Rg8 16.Rhg1 f5 17.g3 O-O-O 18.b4 Kb8 19.Rgd1 d6 20.Qc3 Rg6 21.Bb1 Bf6 22.Qb3 Be7 23.Qc3 Bf6 24.Qb3 Be7 { 1/2-1/2, Ehlvest Jaan 2620 - Oll Lembit 2650 , Tallinn 1998 Memorial P.Keres (active) } ) 10...Bb7 11.O-O ( 11.g4 Nxg4 12.Rg1 Nxh2 13.Ng5 Nc6 14.O-O-O Ne5 15.Nce4 O-O-O 16.Nxc5 bxc5 17.f4 Nef3 18.Nxf7 Nxg1 19.Rxg1 Nf3 20.Rxg7 Rhg8 21.Nxd8 Qxd8 22.Bf6 Qf8 23.Qxh7 Rh8 24.Qg6 Rh1+ 25.Kb2 Rg1 26.Bg5 Rxg5 27.fxg5 Ne5 28.Qf6 Qd6 29.Rg8+ Kc7 30.Kc3 { 1-0, Carlsen Magnus 2484 - Shaposhnikov Evgeny 2573 , Moscow 20. 2.2004 It (open) "Aeroflot" } ) ( 11.Rd1 Be7 12.O-O O-O 13.Ng5 Rd8 14.Nd5 exd5 15.Bxf6 Bxf6 16.Qxh7+ Kf8 17.cxd5 d6 18.Bh5 Bxg5 19.Qh8+ Ke7 20.Qxg7 Rf8 21.Qxg5+ Ke8 22.Rc1 Qd8 23.Qf5 Qe7 24.Rc4 Nd7 25.Rc7 Bc8 26.Rfc1 Kd8 27.Bg4 Qe8 28.R1c6 Rg8 29.h3 b5 30.Qf4 Qf8 { ...1-0, Kiriakov Petr 2554 - Tiviakov Sergei 2611 , Port Erin 1999 It (open) } ) 11...Be7 12.Rad1 { } ( 12.Rac1 d6 13.Rfd1 Nbd7 14.Ng5 Rc8 15.Qb1 h6 16.Nge4 O-O 17.Bf3 Rfd8 18.h3 Nc5 19.Rd2 Nfxe4 20.Nxe4 Nxe4 21.Bxe4 Bf8 22.Ba3 Bxe4 23.Qxe4 Qb8 24.Qf4 b5 25.Rdc2 bxc4 26.Rxc4 Rxc4 27.Qxc4 Qa8 28.Qc7 d5 29.Bxf8 Rxf8 30.Rc6 Rd8 31.Rxa6 Qxa6 { ...1-0, Hoang Thanh Trang 2447 - Vijayalakshmi Subbaraman 2444 , Jodhpur 2003 Ch Asia (team) (w) } ) 12...b5 { N } ( 12...d6 13.Rd2 ( 13.Ng5 Nbd7 14.f4 h6 15.Nge4 O-O 16.f5 d5 17.fxe6 fxe6 18.Ng3 Bd6 19.cxd5 Bxg3 20.hxg3 exd5 21.Rf4 Rae8 22.Qd2 Ne5 23.Rc1 Qd6 24.Ne4 Nxe4 25.Rxe4 Rf6 26.Rf4 Rfe6 27.Qd4 R8e7 28.Rcf1 Ng6 29.Rg4 Ne5 30.Qf4 Qd8 31.Bxe5 Rxe5 32.Bd3 { ...1-0, Rowson Jonathan 2541 - Moldobaev Emelbek 2388 , Calvia 20.10.2004 Olympiad } ) 13...Nbd7 14.Rfd1 { 1/2-1/2, Shariyazdanov Andrey 2576 - Kotsur Pavel 2586 , Calcutta 2002 It (open) } ) ( 12...O-O 13.Ng5 Rd8 14.Nd5 exd5 15.Bxf6 Bxf6 16.Qxh7+ Kf8 17.cxd5 d6 18.Bh5 Bxg5 19.Qh8+ Ke7 20.Qxg7 Rf8 21.Qxg5+ Ke8 22.Rc1 Qd8 23.Qf5 Qe7 24.Rc4 Nd7 25.Rc7 Bc8 26.Rfc1 Kd8 27.Bg4 Qe8 28.R1c6 Rg8 29.h3 b5 30.Qf4 Qf8 31.Bxd7 Bxd7 32.Qf6+ { ...1-0, Kiriakov Petr 2554 - Tiviakov Sergei 2611 , Port Erin 1999 It (open) } ) 13.cxb5 axb5 14.Qd2 b4 15.Nb5 Qb6 16.Bd4 Qa5 17.Bxf6 gxf6 18.Nd6+ Bxd6 19.Qxd6 Rg8 20.Rd4 Ba6 21.Rc1 Qxa2 { ?! } ( 21...Qd8 { !? } 22.Bd1 Qe7 23.Qb6 d5 { } ) 22.Bb5 Qa5 23.Bxd7+ Nxd7 24.Qxd7+ Kf8 25.Rc7 Qh5 26.Qe7+ { } {#r} 1-0