[Event "It (open)"] [Site "masterchessopen.com Biel (Switzerland)"] [Round "6"] [White "Zenklusen Rico (SUI)"] [Black "Petkevich Jusefs (LAT)"] [Result "0-1"] [WhiteElo "2308"] [BlackElo "2436"] [ECO "B90"] [Opening "Sicilian: Najdorf"] { Zenklusen Rico (SUI) +1 =0 -0 Petkevich Jusefs (LAT) +2 =3 -1 Zenklusen Rico (SUI) +1 =0 -0 Petkevich Jusefs (LAT) +2 =3 -1 } 1.e4 { 1 } 1...c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 Nbd7 7.f4 g6 { ? } ( 7...Qb6 8.Qd2 e6 9.O-O-O Be7 10.Nf3 Qc7 11.Re1 b5 12.e5 b4 13.Nd1 dxe5 14.fxe5 Nd5 15.Bxe7 Nxe7 16.Qxb4 Bb7 17.Qc3 Qxc3 18.Nxc3 Bxf3 19.gxf3 Ng6 20.Re4 Ngxe5 21.f4 Ng4 22.Ra4 a5 23.f5 Ngf6 24.fxe6 fxe6 25.Bg2 Ra6 26.Bf1 Ra8 27.Bg2 { ...1/2-1/2, Lhagvasuren Cedendemberel 2300 - Petkevich Jusefs 2440 , Gdynia 1988 Memorial Dreszer } ) 8.Bc4 ( 8.Qf3 Bg7 9.O-O-O O-O 10.h3 Qc7 11.g4 e6 12.Bg2 Rb8 13.Rhe1 b5 14.e5 dxe5 15.fxe5 Nxe5 16.Qg3 b4 17.Bxf6 Bxf6 18.Ne4 Bg7 19.g5 Bb7 20.Nf6+ Bxf6 21.gxf6 Bxg2 22.Rxe5 Rbd8 23.Qe3 Kh8 24.Rg5 Qb7 25.Rg4 e5 { 1-0, Van Blitterswijk Stefan 2351 - Van Der Weide Karel 2467 , Wijk aan Zee 2000 It (open) } ) ( 8.Qe2 Bg7 9.e5 dxe5 10.fxe5 Nh5 11.O-O-O Bxe5 12.Nd5 Nhf6 13.Nf3 Nxd5 14.Nxe5 h6 15.Bh4 N5b6 16.Nxg6 fxg6 17.Qe6 g5 18.Qg6+ Kf8 19.Bc4 { 1-0, McDonald Neil R 2360 - Hodgson Julian M 2555 , London 1990 It (open) "Lloyds Bank" } ) 8...Bg7 { +0,00 CAP } 9.Nf3 { N } ( 9.Qe2 Qc7 ( 9...O-O 10.Nf3 b5 11.Bd3 Bb7 12.O-O Nc5 13.Rae1 Ne6 14.Qd2 Nxg5 15.Nxg5 Qa5 16.a3 b4 17.Nd1 Qc5+ 18.Qf2 Qxf2+ 19.Nxf2 bxa3 20.bxa3 Nd7 21.Rb1 Nc5 22.Rfe1 Bc3 23.Re2 Rab8 24.Bc4 h6 25.Nf3 d5 26.exd5 Bxd5 27.Rxb8 Rxb8 28.Bxd5 Rb1+ { ...0-1, Tebourbi K - Burgener F, Oerebro 1966 Ch World (team) (students) } ) 10.O-O-O O-O 11.Rhe1 b5 12.Bb3 e6 13.e5 dxe5 14.fxe5 Ne8 15.Be7 Nxe5 16.Bxf8 Kxf8 17.Ne4 Nc6 18.Nxc6 Qxc6 19.Qf2 a5 20.Ng5 Nf6 21.Rd8+ Ke7 22.Bd5 Nxd5 23.Rxc8 Qxc8 24.Qxf7+ Kd6 25.Rxe6+ Kc5 26.Qf2+ Kb4 27.Re4+ Qc4 28.a3+ { 1-0, Jansa Vlastimil 2450 - Wheeler GW 2024 , Prague 1963 Match "Prague-London" (under 26) } ) ( 9.Qe2 Qc7 10.O-O-O O-O 11.Rhe1 b5 12.Bb3 e6 13.e5 dxe5 14.fxe5 Ne8 15.Be7 Nxe5 16.Bxf8 Kxf8 17.Ne4 Nc6 18.Nxc6 Qxc6 19.Qf2 a5 20.Ng5 Nf6 21.Rd8+ Ke7 22.Bd5 Nxd5 23.Rxc8 Qxc8 24.Qxf7+ Kd6 25.Rxe6+ Kc5 26.Qf2+ Kb4 27.Re4+ Qc4 28.a3+ { 1-0, Jansa Vlastimil 2450 - Wheeler GW 2024 , Prague 1963 Match "Prague-London" (under 26) } ) 9...Qc7 10.Qe2 e5 { ? } ( { ? } 10...Nb6 11.Bb3 Nh5 12.Qd2 h6 { } ) 11.fxe5 dxe5 12.O-O O-O 13.Kh1 b5 14.Bb3 Bb7 15.Rad1 h6 16.Bh4 Rae8 { ?! } ( 16...Nb6 { !? } 17.Nd2 g5 18.Bf2 b4 { } ) 17.a3 Nh5 { ?! } ( 17...Rc8 { !? } 18.Ne1 g5 19.Bf2 Nb6 { } ) 18.Qd2 { ?! } ( 18.Nd5 { !? } 18...Bxd5 19.exd5 Qd6 20.Be1 { } ) 18...Nc5 19.Bd5 Nf4 20.Bxb7 Qxb7 21.Qe3 Nce6 22.Rd6 Nd4 23.Bf6 Qb8 { ?! } ( 23...Qc7 { !? } 24.Rxa6 b4 25.Bxg7 Kxg7 { } ) 24.Bxg7 Kxg7 25.Rxa6 Nxc2 26.Qf2 { ?! } ( 26.Qg1 { !? } 26...Nd3 27.Nd5 b4 28.Rb6 { } ) 26...b4 27.Qxc2 { ?! } ( 27.Rb6 { !? } 27...Nd3 28.Qg1 Qc8 29.Nd5 { } ) 27...bxc3 28.Qxc3 { ? } ( { ? } 28.Rb1 Rc8 29.h3 cxb2 30.Qxb2 { } ) 28...Qb5 29.Nd2 Qxa6 30.Rxf4 Rc8 { } {#R} 0-1