Author: Robert Hyatt
Date: 07:04:56 10/15/98
Go up one level in this thread
On October 14, 1998 at 11:14:25, Djordje Vidanovic wrote:
>I had Crafty 15_18 play a blitz match (4 min + 2 sec inc) against the 1.21
>Little Goliath update. In game 13 (ominous number?) of their match Crafty
>blundered away a clear win. The Crafty twilight zone started on move 75 and
>ended on move 77 after which the previously won position was a clear loss.
>Little Goliath garnered an undeserved win and I was left completely in the dark:
> hash-collision, tablebase problems??? Perhaps Bob Hyatt can help. Here's the
>game. (Endscore 15-5 for Crafty)
>PS: AMD-K6-II/300 128MB, 10 megs of hash for Crafty.
>
>Regards,
>Djordje
>
finally had time to look at this. Questions: (1) do you have the
KRPKR.* tablebases? I can't get my program to consider anything but
Ka4 here... Although at move 75, b5+ also seems to be ok, based on a
search of just that move (+4.76)...
wait! at move 76, Rd5 is a blunder. And on my machine, I *instantly*
get Rd5 is a draw. So I now assume you don't have KRPKR tablebases?
WAIT! :) At move 76, with egtb=0, it also sees this is a draw.
Do you by any chance have KRP KR databases, and if so, do the sizes
match these:
-rw-r--r-- 1 hyatt chess 536870912 Apr 28 11:02 KRPKR.tbb
-rw-r--r-- 1 hyatt chess 536870912 Apr 28 11:02 KRPKR.tbw
If not, do they match these:
-rw-rw-r-- 1 hyatt 30 111633299 Oct 16 1997 KRPKR.tbb.gz
-rw-rw-r-- 1 hyatt 30 74903494 Oct 16 1997 KRPKR.tbw.gz
If they match the latter, you forgot to unzip them. They are useless
in that compressed state. They must be 536,870,912 bytes long, or you
are dead...
Let me know what is going on here..
Note that if you download databases, since they are xxx.yyy.zzz filename,
some versions of IE and netscape will drop the .zzz for you without saying
anything. leaving you with totally ruined databases...
>
>[Event "Computer chess game"]
>[Site "HAL"]
>[Date "1998.10.13"]
>[Round "13"]
>[White "wcrafty-15_18"]
>[Black "lgol1_21.exe"]
>[Result "0-1"]
>[TimeControl "240+2"]
>
>1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5 Ngf6 6. Bd3 e6 7. Qe2 Bd6
>8. Bd2 Qb6 9. O-O-O Qxd4 10. Be3 Qa4 11. Kb1 h6 12. Bc4 Bc7 13. Bb3 Qa6 14.
>Qxa6 bxa6 15. N5h3 Bb6 16. Bf4 g5 17. Be3 Bxe3 18. fxe3 Ng4 19. Re1 Nde5
>20. Nf3 c5 21. Ba4+ Ke7 22. e4 Rb8 23. Re2 Nxf3 24. gxf3 Ne5 25. f4 gxf4
>26. Nxf4 Rd8 27. c3 Bd7 28. Bc2 Bc6 29. b3 c4 30. Ka1 Nd3 31. Rf1 Nxf4 32.
>Rxf4 cxb3 33. axb3 e5 34. Rf5 f6 35. Rg2 Rg8 36. Rgf2 Rg1+ 37. Kb2 Rg6 38.
>h4 Rf8 39. Rh5 a5 40. c4 Ke6 41. Kc3 Rd8 42. Rhf5 Rg3+ 43. Kb2 Rf8 44. Rh5
>Rg4 45. Rxh6 Bxe4 46. h5 Bxc2 47. Rxc2 Rh4 48. Rc1 Rh2+ 49. Rc2 Rh3 50. Rc3
>Rh4 51. Rc1 Rh2+ 52. Rc2 Rh3 53. Rc3 Rh1 54. Rd3 e4 55. Rd4 Rh4 56. Rh7
>Rh2+ 57. Ka3 f5 58. Rd5 f4 59. Rxa5 Rf6 60. Rc7 Rf8 61. Rc6+ Kd7 62. Rh6
>Ra8 63. Rd5+ Kc7 64. Rf5 Rd8 65. Rxf4 e3 66. Ra6 Rdd2 67. Rxa7+ Kd6 68. Rh7
>e2 69. Re4 Rd1 70. Rhe7 e1=Q 71. Rxe1 Rxe1 72. Rxe1 Rxh5 73. b4 Rh8 74.
>Rd1+ Kc6 75. b5+ Kc5 76. Rd5+ Kxc4 77. b6 Ra8+ 78. Ra5 Rxa5+ 79. Kb2 Rb5+
>80. Kc2 Rxb6 81. Kd2 Re6 82. Kc2 Re2+ 83. Kd1 Kd3 84. Kc1 Kc3 85. Kb1 Re1+
>86. Ka2
>{White resigns} 0-1
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