Author: Miguel A. Ballicora
Date: 06:33:50 01/18/02
Go up one level in this thread
On January 18, 2002 at 08:06:27, David Rasmussen wrote:
>[D]8/4Q3/1p4pk/4pp2/7p/P6P/1q1r1PP1/5RK1 b - - 0 50
>
>In this position during a game, Chezzz moved 50... e4??
>
>Why? I haven't got a clue. When I give it the position now, I can't make it play
>anything else but 50... Qd4 . So I guess I have a bug of some sort. Do you guys
>have any idea of what might cause such a thing? I guess it is time to implement
>that log... Then I could check what the hell Chezzz was thinking at the time. If
>I print out node counts, I can even establish the exact same hashing environment
>etc. I guess I could debug it then. Oh well...
>
>/David
I had a similar bug. It was hashtable bug, I did not update (the line was
deleted or something) the id that determines the aging of the hashtable, so
Gaviota was playing with an old hashtable and once in a while picked an entry
that was a collision from several, several moves ago.
(at least, that was my interpretation because the problem was gone when I fixed
that stupid problem)
Regards,
Miguel
>
>P.S. Here is the game:
>
>[Event "ICC 5 0"]
>[Site "Internet Chess Club"]
>[Date "2002.01.18"]
>[Round "-"]
>[White "Tinker"]
>[Black "Chezzz"]
>[Result "1-0"]
>[ICCResult "Black checkmated"]
>[WhiteElo "2520"]
>[BlackElo "2503"]
>[Opening "Caro-Kann: Panov-Botvinnik attack, 5...e6"]
>[ECO "B14"]
>[NIC "CK.03"]
>[Time "07:26:22"]
>[TimeControl "300+0"]
>
>1. e4 c6 2. c4 d5 3. exd5 Nf6 4. Nc3 cxd5 5. d4 e6 6. Nf3 Bb4 7. Bd3 dxc4 8.
>Bxc4 Be7 9. Be3 O-O 10. O-O Nc6 11. Ne5 Nxe5 12. dxe5 Nd7 13. Bd4 Qa5 14.
>Qe1 Bc5 15. Rd1 Bxd4 16. Rxd4 Nxe5 17. Nd5 Nxc4 18. Ne7+ Kh8 19. Rxc4 Qd8
>20. Qb4 Re8 21. Nxc8 Rxc8 22. Rxc8 Qxc8 23. Qd4 Qb8 24. Qd7 Kg8 25. Re1 Rd8
>26. Qa4 Qd6 27. Rf1 Qd2 28. Qb5 b6 29. h3 Kf8 30. Qb3 Rd3 31. Qc4 Rd4 32.
>Qc7 Qxb2 33. Qb8+ Ke7 34. Qxa7+ Rd7 35. Qa8 Rd2 36. Qb7+ Rd7 37. Qa8 h5 38.
>Qb8 g6 39. Re1 Rd2 40. Qc7+ Kf8 41. Rf1 Qd4 42. Qa7 Kg7 43. Qa3 e5 44. Qb3
>Rb2 45. Qa3 h4 46. Qa8 Rd2 47. a3 f5 48. Qf3 Qb2 49. Qb7+ Kh6 50. Qe7 e4 51.
>Qxh4+ Kg7 52. Qe7+ Kh8 53. Qf7 Qg7 54. Qe6 b5 55. Qe8+ Kh7 56. Qxb5 Qa7 57.
>a4 Ra2 58. Qe5 Qxa4 59. Rc1 Rc2 60. Ra1 Qd7 61. Qb8 Qg7 62. Ra7 Rc1+ 63. Kh2
>Rc2 64. Rxg7+ Kxg7 65. Kg3 Rd2 66. Qc7+ Kf8 67. Kf4 Ke8 68. Ke5 Rd7 69. Qc6
>Kd8 70. Ke6 Re7+ 71. Kd6 Ra7 72. Qb6+ Ke8 73. Qxa7 Kf8 74. Ke6 Kg8 75. Kf6
>Kf8 76. Qa8# {Black checkmated} 1-0
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