Author: Vincent Lejeune
Date: 17:06:03 04/21/02
Go up one level in this thread
On April 21, 2002 at 19:29:39, Will Singleton wrote: >All, > >[D]5nk1/2R3p1/r4p2/4P3/p2R2N1/7P/1r4P1/7K b - - 0 42 > >The question is, my prog wants to play a3, and doesn't see the forced repetition >until ply 9. I've just thrown away my old buggy rep code, and replaced it with >a dedicated hash table. The new stuff seems to be debugged and working (maybe), >but there must be a trick to getting this position earlier. An extension, >perhaps? > >Will From this game (variation at move 42.Rxf7+ ?) it take a while to see the draw ... [d]1r6/2p2Rk1/6p1/2QpP1q1/P2P4/8/5PP1/6K1 b - - 0 42 [Event "ICS Rated standard match"] [Site "192.168.0.2"] [Date "2000.03.12"] [Round "?"] [White "Deep Junior"] [Black "Xie Jun"] [Result "1-0"] [ECO "C92"] [WhiteElo "2666"] [BlackElo "2647"] [Annotator "DRAW ???"] [PlyCount "99"] [EventDate "2000.??.??"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 a5 10. d4 a4 11. Bc2 exd4 12. Nxd4 Nxd4 13. cxd4 d5 14. e5 Ne4 15. Qe2 Rb8 16. Nc3 Nxc3 17. bxc3 Bd7 18. Qd3 g6 19. Qf3 Be6 20. Bh6 Re8 21. Qf4 Rb6 22. Re3 Qd7 23. Bd1 b4 24. cxb4 Rxb4 25. a3 Rb2 26. Rc3 Reb8 27. Rac1 R8b7 28. h4 Rb1 29. h5 Rxc1 30. Qxc1 Bf5 31. Bc2 Bxc2 32. Qxc2 Qg4 33. Qxa4 Rb1+ 34. Kh2 Rb8 35. Qa7 Rc8 36. hxg6 hxg6 37. a4 Bf8 38. Bxf8 Kxf8 39. Rf3 Kg7 40. Kg1 Qg5 41. Qc5 Rb8 42. Qc2 (42. Rxf7+ Kxf7 43. Qxc7+ Ke6 44. Qxb8 Qc1+ 45. Kh2 Qf4+ 46. Kh3 Qh6+ 47. Kg3 Qg5+ 48. Kf3 Qf5+ 49. Ke3 Qe4+ 50. Kd2 Qxd4+ 51. Ke2 Qc4+ 52. Ke3 Qe4+ 53. Kd2 Qf4+ 54. Ke2 Qc4+ 55. Ke3 Qe4+ 56. Kd2 Qf4+ 57. Kd3 Qc4+ 58. Kd2 Qf4+) 42... Rb4 43. e6 Rc4 44. Rxf7+ Kg8 45. Qb3 Qc1+ 46. Kh2 Qh6+ 47. Kg3 Qg5+ 48. Kf3 Qh5+ 49. Ke3 Qg5+ 50. Kd3 (50. Kd3 Qd8 51. e7 Qe8 52. Rf8+ Qxf8 53. exf8=Q+ Kxf8 54. a5) 1-0
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