[Event "It"] [Site "Groningen (Netherlands)"] [Round "4"] [White "Steiner Hermann (USA)"] [Black "Botvinnik Mikhail M (RUS)"] [Result "0-1"] [WhiteElo "0"] [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 {8}) 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