[Event "Ch Hungary (team) 2005/06"] [Site "masterchessopen.com Hungary"] [Date "2006.04.23"] [Round "11"] [White "Erdos Viktor (HUN)"] [Black "Cao Sang (HUN)"] [Result "1-0"] [WhiteElo "2503"] [BlackElo "2548"] [ECO "D85"] [Opening "Gruenfeld: Exchange, 5.e4"] { Erdos Viktor (HUN) +0 =4 -0 } 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 Nc6 9.Be3 O-O 10.O-O Qc7 11.Rc1 ( 11.Rb1 a6 12.Qc1 b5 13.Bb3 Bb7 14.f3 Na5 15.dxc5 Rfd8 16.Rd1 e6 17.Rxd8+ Rxd8 18.Qc2 Bf8 19.Rd1 Rc8 20.Qd2 Bxc5 21.Bxc5 Qxc5+ 22.Qd4 Kf8 23.Kf2 Ke7 24.Qxc5+ Rxc5 25.Ke3 e5 26.Kd2 Nc4+ 27.Bxc4 Rxc4 28.Kc2 Bc8 29.Nc1 Be6 30.a3 a5 { ...1/2-1/2, Erdos Viktor 2151 - Sipos Istvan 2174 , Paks 21. 4.2000 Ch Hungary (juniors) (under 14) } ) 11...Na5 12.Bd3 { ? } 12...Bd7 ( 12...b6 13.Qd2 Bb7 14.Bh6 Rad8 15.h4 Qd6 16.d5 c4 17.Bc2 e6 18.Bxg7 Kxg7 19.f4 f5 20.Nd4 fxe4 21.dxe6 Nc6 22.f5 Nxd4 23.cxd4 Qe7 24.Ba4 Rxf5 25.Rxf5 gxf5 26.Qf4 Bd5 27.Qe5+ Kg6 28.Rc3 f4 29.h5+ { 1-0, Jussupow Artur 2635 - Tseshkovsky Vitaly 2485 , Minsk 1987 Ch URS } ) 13.Qd2 { N } ( 13.Nf4 Bc6 14.e5 Rad8 15.Qg4 b5 16.h4 Qd7 17.Qg3 Bd5 18.Bb1 Be6 19.Nd3 Nb7 20.Nxc5 Nxc5 21.dxc5 Bf5 22.Bd4 a6 23.c6 Qe6 24.Bxf5 Qxf5 25.a4 bxa4 { 1/2-1/2, Tarjan James E 2535 - Romanishin Oleg M 2575 , Jakarta 1983 It (cat.11) } ) ( 13.dxc5 Rfd8 14.Qc2 Be6 15.c4 Nc6 16.Nf4 Nb4 17.Qb3 Nxd3 18.Nxd3 Qc6 19.f3 Bd4 20.Bxd4 Rxd4 21.Nf4 Qxc5 22.Nxe6 fxe6 23.Kh1 b6 24.Rc3 Rc8 25.Rfc1 b5 26.cxb5 Qxc3 27.Qxe6+ Kg7 28.Qxe7+ Kh6 29.Qh4+ Kg7 30.Qe7+ Kh6 31.Qh4+ { 1/2-1/2, Ertl Daniel 1660 - Soergel Frank 2207 , Germany 1999 Bayern Regionalliga Northeast 1999/00 } ) 13...Rfd8 14.f4 { +0.00 CAP N } ( 14.Bh6 { +0.76 CAP } ) 14...b5 15.f5 Nc4 16.Bxc4 bxc4 17.Bh6 Bh8 18.Bf4 Qb6 19.d5 Bg7 20.Rb1 Qa6 21.Ng3 Be8 22.Rf3 Rd7 23.Rbf1 Rad8 24.Qf2 Rc8 { ?! } ( 24...Rb7 { !? } 25.Bg5 f6 26.Be3 Rdb8 27.Bxc5 Rb2 28.Ne2 Qxa2 29.Re1 R8b7 { } ) 25.h4 Qa5 26.h5 Bxc3 { ? } ( 26...Rb7 27.fxg6 hxg6 28.Bd2 f6 29.h6 Bf8 30.e5 Qxa2 31.exf6 Bxh6 32.Bxh6 Rb2 33.f7+ Bxf7 { } ) 27.fxg6 hxg6 28.hxg6 fxg6 29.Be3 Bf6 30.e5 Bxe5 31.Rf8+ Kg7 32.Rxe8 Bf6 33.Rxc8 Rxd5 34.Rxc5 { } {#r} 1-0