Author: Dieter Buerssner
Date: 09:53:20 08/04/01
Go up one level in this thread
On August 04, 2001 at 04:39:54, Kai Skibbe wrote:
>>>I bet for game relevant positions it didn't change a bit though.
>>
>>Yes, it did. A move, that was drawing was returning a mate score from TBs,
>>because the ep-square was set (only one pawn on the board, which just made a
>>double step).
>Could you please post the game.
[Event "Computer chess game"]
[Site "A MI G+P_NK"]
[Date "2000.09.23"]
[Round "-"]
[White "LG2000v29a"]
[Black "Yace_022c"]
[Result "1/2-1/2"]
[TimeControl "40/2400"]
1. d4 Nf6 2. Bg5 Ne4 3. Bf4 c5 4. e3 Qb6 5. Nc3 Nxc3 6. bxc3 e6 7. Bd3 cxd4
8. exd4 Qc6 9. Nf3 Qxc3+ 10. Bd2 Qc7 11. O-O Be7 12. c4 O-O 13. Qe2 Nc6 14.
Rab1 d5 15. cxd5 exd5 16. Rfc1 Re8 17. Ne5 Bf6 18. f4 Be6 19. Be3 Rac8 20.
Rc2 Qe7 21. f5 Bxe5 22. dxe5 Bd7 23. Rxb7 Qxe5 24. Qf2 Rc7 25. Rxc7 Qxc7
26. Bd2 Qb8 27. Rc3 Qb2 28. f6 Ne5 29. Qd4 Qa1+ 30. Bf1 Bb5 31. Rc4 Qxd4+
32. Rxd4 Bxf1 33. Kxf1 Rd8 34. fxg7 Kxg7 35. Ra4 Rd7 36. Be3 Nc6 37. Ra6
Rc7 38. Bc5 f6 39. Bd6 Rc8 40. Bc5 Kg6 41. a3 d4 42. Bxa7 d3 43. Be3 Ne5
44. Rd6 Rc3 45. Bd4 Rc1+ 46. Kf2 Nc4 47. Rxf6+ Kg5 48. Kg3 d2 49. h4+ Kh5
50. Rf5+ Kg6 51. Rf6+ Kg7 52. Rf2+ Kg8 53. Rxd2 Nxd2 54. h5 Rc4 55. Be5 Kf7
56. Kf2 Rh4 57. Kg3 Rxh5 58. Bd6 Rg5+ 59. Kh2 Ke6 60. Bb4 Nf1+ 61. Kg1 Ne3
62. Kf2 Nxg2 63. Bd2 Rb5 64. Bb4 Rxb4 65. axb4 Nf4 66. Kg3 h5 67. Kxf4 h4
68. Kg4 Kd5 69. Kxh4 Kc4 70. b5 Kxb5
{Draw} 1/2-1/2
The blunder was 66...h5. Here previous versions of Yace set the ep-target.
Probing the position in TBs with ep set returned a mate score. (At that time I
did not use the newest probing code of Eugene Nalimove).
Regards,
Dieter
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