Author: Uri Blass
Date: 01:39:24 06/11/01
Go up one level in this thread
On June 11, 2001 at 03:44:26, Christophe Theron wrote:
>On June 11, 2001 at 01:35:52, Jonas Cohonas wrote:
>
>>In this game Gambit Tiger2.0 (Chesstosteron) operated by me played an amateur
>>engine called queenmaximus, pieces flying all over the place in a great game :-)
>>the peculiar thing happened at move 63 in this position:
>>
>>[D] 6r1/PKP5/8/8/5k2/8/8/8 w - - 0 63
>>
>>where the endgame tb's started repeating the position, luckily i was observing
>>the game and finished the game myself, thus the patzer mate :-), i use the
>>endgame files from the 4 shredder cd's try it out and get a good laugh.
>>Afterwards it tried repeating blacks moves and surely white kept repeating Kb6
>>Kb7 Kb6 etc... :-)
>>
>>
>>[Event "ICC 2 12"]
>>[Site "Internet Chess Club"]
>>[Date "2001.06.11"]
>>[Round "-"]
>>[White "Chesstosteron"]
>>[Black "QueenMaxima"]
>>[Result "1-0"]
>>[ICCResult "Black checkmated"]
>>[WhiteElo "2470"]
>>[BlackElo "2365"]
>>[Opening "KGD: Nimzovich counter-gambit"]
>>[ECO "C31"]
>>[NIC "KG.04"]
>>[Time "00:55:16"]
>>[TimeControl "120+12"]
>>
>>1. e4 e5 2. f4 d5 3. exd5 c6 4. Nc3 cxd5 5. Qh5 Nc6 6. Bb5 exf4 7. Nxd5 g5
>>8. Nc3 Bd7 9. Qe2+ Be7 10. Nf3 h6 11. Nd5 a6 12. Ba4 Bg4 13. Qe5 f6 14. Qe4
>>Kf7 15. Bb3 Kg7 16. Ne3 h5 17. h3 Bd7 18. Nd5 Bc5 19. d3 Na5 20. Nxg5 fxg5
>>21. Qe5+ Kh7 22. Qe4+ Kh6 23. h4 Bd6 24. hxg5+ Qxg5 25. Nxf4 Nxb3 26. Rxh5+
>>Qxh5 27. Nxh5+ Nxc1 28. Qd4 Be5 29. Qxd7 Bxb2 30. Rb1 Bc3+ 31. Kd1 Kxh5 32.
>>Rb6 Nf6 33. Qf5+ Kh4 34. Rxf6 Bxf6 35. Qxf6+ Kg4 36. Kxc1 b5 37. c4 bxc4 38.
>>dxc4 Rhf8 39. Qg6+ Kf4 40. c5 Ke5 41. Qd6+ Ke4 42. c6 Rf1+ 43. Kb2 Rf2+ 44.
>>Kc3 Rxg2 45. Qd3+ Kf4 46. Qf1+ Kg3 47. c7 Rc8 48. Qe1+ Rf2 49. Kd3 Kg2 50.
>>Qe4+ Kg3 51. Qg6+ Kh4 52. Qd6 Rff8 53. Qxa6 Rce8 54. Qh6+ Kg4 55. a4 Kg3 56.
>>a5 Rf3+ 57. Kd4 Rf4+ 58. Kc5 Rff8 59. Qxf8 Rxf8 60. Kb6 Ra8 61. a6 Rf8 62.
>>a7 Rg8 63. Kb7 Kf4 64. Kb6 Kg4 65. Kb7 Kf4 66. a8=Q Rxa8 67. Kxa8 Ke4 68.
>>c8=Q Kd4 69. Qf5 Kc3 70. Qe4 Kd2 71. Qf3 Kc2 72. Ka7 Kd2 73. Kb6 Kc2 74. Kc5
>>Kb1 75. Qf2 Kc1 76. Kc4 Kd1 77. Kc3 Kc1 78. Qf1# {Black checkmated} 1-0
>>
>>Regards
>>Jonas
>
>
>
>You are probably missing the KQP/KR tablebase.
>
>You need to install all the 5 men tablebases, or else you can get this kind of
>problem...
>
>
>
> Christophe
This problem is known for a long time and I am surprised that all the
programmers do the same mistake of repetition and do not tell their program to
stop using tablebase when they see a longer mate instead of shorter mate.
I believe that the ssdf is also using only part of the tablebases files in their
games so I guess that the tigers may lose 1-5 rating points in the ssdf list
from these repetitions(I understand that in this case Tiger14 won the game only
because of the fact that the operator finished the game manually).
Uri
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