Author: Gerd Isenberg
Date: 00:21:33 06/05/02
In the last round from 2nd CSNV in Leiden IsiChess played Sjeng and hit a lucky punch with a little help of king (un)safety heuristics. But i'm not quite sure whether the sac 22.Nf6+ really wins. What does your engine think about it? [Event "2nd Intl. CSVN"] [Site "Leiden Ned"] [Date "2002.06.02"] [Round "9"] [White "IsiChess X"] [Black "Sjeng"] [Result "1-0"] [ECO "B84"] [PlyCount "83"] [EventDate "2002.05.??"] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Nf6 7. O-O Be7 8. f4 d6 9. Be3 O-O 10. g4 Re8 11. f5 exf5 12. Nxf5 Bxf5 13. Rxf5 Bd8 14. Nd5 Qc8 15. Qd3 Nc6 16. Raf1 Qe6 17. R1f4 Nxe4 18. Bf3 Ng5 19. Bg2 g6 20. Rf6 Qe5 21. Rxf7 Qxb2 22. Nf6+ Kxf7 23. Nxe8+ Kxe8 24. Qxd6 Ne7 25. Rf2 Nf7 26. Qe6 Ne5 27. Kh1 g5 28. Bxg5 N5g6 29. Bxe7 Qa1+ 30. Rf1 Qxf1+ 31. Bxf1 Bxe7 32. Bd3 Nf8 33. Qb6 Rb8 34. Qc7 Rd8 35. Qxb7 Rd4 36. Qxa6 Kf7 37. h3 Kg7 38. a4 Rd5 39. a5 Bf6 40. Qb6 Rd7 41. g5 Bxg5 42. Qg1 1-0 Position before 22.Nxf6: [D] r2br1k1/1p3R1p/p1np2p1/3N2n1/5RP1/3QB3/PqP3BP/6K1 w - - IsiChess played 22.Nf6+ with slightly positive score, but expected 22...Bxf6 instead of 22...Kxf7. [D] r2bk3/1p2n2p/p2Q2p1/6n1/6P1/4B3/PqP2RBP/6K1 b - - am Nf7 bm h6 A few moves later Sjeng failed by 24...Nf7?, instead of 24...h6, which seems to be unclear or drawish. Gerd
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