[Event "It"] [Site "Groningen (Netherlands)"] [Round "4"] [White "Steiner Hermann (USA)"] [Black "Botvinnik Mikhail M (RUS)"] [Result "0-1"] [BlackElo "2630"] [ECO "A40"] [Opening "Queen's Pawn: 1...e6 2.c4"] 1.d4 e6 2.c4 f5 3.g3 Nf6 4.Bg2 Bb4+ 5.Bd2 Be7 6.Nc3 O-O ( 6...d5 { !? } ) 7.Qc2 d5 8.Nf3 c6 9.O-O Qe8 10.Bf4 ( 10.Bg5 Qh5 11.Bxf6 Bxf6 12.cxd5 exd5 ( 12...cxd5 { = } ) 13.e3 Nd7 14.b4 { ± } ) 10...Qh5 11.Rae1 { ? ?d2, f3, e4 } ( 11.c5 Nbd7 12.b4 Ne4 13.b5 { ? } ) 11...Nbd7 12.Nd2 { ? } ( 12.b3 Ne4 13.Ne5 g5 { ?! } 14.Nxd7 Bxd7 15.Be5 Nd6 16.cxd5 cxd5 17.Nxd5 { ! } 17...exd5 18.Qc7 Qe8 19.Bxd6 Rc8 20.Bxd5+ Rf7 21.Bxf7+ Kxf7 22.Qxb7 Bxd6 23.Rc1 { ? } ) 12...g5 { ! } 13.Bc7 Ne8 14.Be5 Nxe5 15.dxe5 f4 { ! ? f4xg3, g5-g4, ?h5xe5 } 16.gxf4 ( 16.Nf3 { ? } 16...g4 ) ( 16.e4 f3 { ! } ) 16...gxf4 17.Nf3 ( 17.e3 Qxe5 ( 17...f3 18.Qd1 { ! } ) ) ( 17.e4 d4 { ! } 18.Ne2 Qxe5 19.Nf3 Qh5 20.Nexd4 e5 { ? } ) 17...Kh8 18.Kh1 ( 18.e3 { ? } 18...Rg8 19.Kh1 Rxg2 20.Kxg2 Qg4+ { ??+ } ) 18...Ng7 19.Qc1 ( 19.e4 fxe3 20.fxe3 Nf5 21.Qf2 Rg8 22.Ne2 Qh6 { ??+ } ) 19...Bd7 20.a3 Rf7 21.b4 Rg8 22.Rg1 Nf5 23.Nd1 Rfg7 { ! } 24.Qxf4 Rg4 25.Qd2 Nh4 26.Ne3 ( 26.Nxh4 Rxh4 27.h3 Rxh3+ 28.Bxh3 Qxh3# ) 26...Nxf3 27.exf3 ( 27.Bxf3 Qxh2+ 28.Kxh2 Rh4# ) 27...Rh4 28.Nf1 Bg5 ( 28...Bg5 29.Qb2 Bf4 30.cxd5 Rxh2+ 31.Nxh2 Qxh2# ) 0-1