Author: Robert Hyatt
Date: 15:11:08 05/17/00
Go up one level in this thread
On May 17, 2000 at 15:53:21, Jerry Adams wrote: >On May 17, 2000 at 15:34:05, Robert Hyatt wrote: > >>On May 17, 2000 at 15:10:51, Jerry Adams wrote: >> >>>Hi >>> >>> My Crafty has been losing won positions because of it's horrible endgame. At >>>present I have absolutely no tablebases. I was under the impression that >>>tablebases would only account for a few additional rating points. Iv'e seen >>>crafty actually draw when it had a rook and King against a King!!! Question: How >>>can I build tablesbases without using alot of harddrive space? I only have a 4 >>>gig hardrive. I would like crafty to be able to atleast win rudimentary >>>endgames. I am using winboard. >> >> >>If it draws with rook and king vs king, you have something broken. It has >>specific code for such 'mating position'. I have had it play hundreds of games >>with itself, one side using egtb's, the other not. It has never failed to mate >>with KR vs K easily. Not "optimally" usually, but quickly and easily. >> >>IMHO Crafty is not a "stupid program" in endings. It handles itself pretty well >>most of the time. Unless something is broken or mis-configured. If you have a >>log.nnn file where it couldn't win KR vs K, that might tell what was happening. > > > > OKay here is the game played on ICC , Judge for yourself > > > >Event "ICS rated blitz match"] >[Site "chessclub.com"] >[Date "1998.12.05"] >[Round "?"] >[White "PostModernist"] >[Black "cmslim"] >[Result "1/2-1/2"] >[WhiteElo "2681"] >[BlackElo "2389"] >[ECO "C24"] > >1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nf3 Be7 5. O-O O-O 6. Re1 d6 7. a4 h6 >8. h3 Na5 9. Bd5 Nxd5 10. exd5 Bf6 11. Bd2 c6 12. Bxa5 Qxa5 13. dxc6 bxc6 >14. Nc3 Rb8 15. Ne4 Be7 16. b3 Qc7 17. d4 d5 18. Nc3 e4 19. Ne5 Bb4 20. >Qd2 c5 21. Nxd5 Bxd2 22. Nxc7 Bc3 23. Nb5 Bxa1 24. Rxa1 cxd4 25. Nxa7 d3 >26. Nac6 dxc2 27. Nxb8 Rd8 28. Nbd7 Bxd7 29. Rc1 Bxa4 30. Rxc2 Bxb3 31. >Rb2 Be6 32. Rb4 f6 33. Nc6 Rd6 34. Nd4 Bd7 35. Kh2 f5 36. h4 g5 37. h5 >Kg7 38. Nb3 Be8 39. Nd4 Kf6 40. Rb8 Bf7 41. Nb5 Ra6 42. Nd4 f4 43. Rb5 >Bxh5 44. Nf5 Ra2 45. Nxh6 Rxf2 46. Ng8+ Kf7 47. Rxg5 e3 48. Kg1 Bg6 49. >Nh6+ Kf6 50. Rc5 Re2 51. Ng4+ Kg7 52. Rc7+ Kg8 53. Rc8+ Kf7 54. Ne5+ Kf6 >55. Nxg6 Kxg6 56. Kf1 Rd2 57. Re8 Kf5 58. Re7 Kg4 59. Rg7+ Kf5 60. Re7 >Kg4 61. Rg7+ Kh5 62. Re7 Kh4 63. Rh7+ Kg5 64. Re7 Rc2 65. Re8 Ra2 66. Rb8 >Rd2 67. Re8 Kg4 68. Rh8 Rb2 69. Rg8+ Kh5 70. Rh8+ Kg6 71. Rf8 Kg5 72. Rh8 >Rf2+ 73. Kg1 Rd2 74. Rg8+ Kf5 75. Kf1 Rf2+ 76. Kg1 Ra2 77. Rf8+ Kg5 78. >Rg8+ Kf5 79. Rf8+ Ke4 80. Re8+ Kd3 81. Rd8+ Ke2 82. Rd4 f3 83. gxf3 Ra8 >84. Rd5 Rg8+ 85. Kh2 Kf2 86. Kh3 e2 87. Re5 Rg3+ 88. Kh4 Rxf3 89. Rxe2+ >Kxe2 90. Kg5 Kf2 91. Kg6 Kf1 92. Kg7 Re3 93. Kg8 Ke2 94. Kg7 Rg3+ 95. Kf7 >Ke3 96. Kf8 Rf3+ 97. Ke8 Ke2 98. Ke7 Ke1 99. Kd6 Rg3 100. Kd5 Rd3+ 101. >Ke4 Ra3 102. Kd4 Ke2 103. Kd5 Ra7 104. Kd6 Kf3 105. Kc6 Kg3 106. Kd6 Ra1 >107. Ke7 Kg4 108. Kd6 Kf3 109. Ke6 Kf4 110. Kd6 Ra7 111. Ke6 Rh7 112. Kd5 >Rh1 113. Kd6 Kf5 114. Kd7 Kg6 115. Ke7 Rh7+ 116. Ke6 Rh1 117. Ke7 Rc1 118. >Ke6 Ra1 119. Ke5 Ra6 120. Ke4 Ra7 121. Ke5 Rh7 122. Ke6 Rh6 123. Ke5 Rh1 >124. Ke4 Kf6 125. Kd4 Kf7 126. Ke4 Ke6 127. Kd4 Ke7 128. Kd5 Rh7 129. Kc5 >Kf6 130. Kd5 Rh4 131. Kd6 Rh1 132. Kc6 Rc1+ 133. Kd6 Kf7 134. Kd7 Rb1 135. >Kd6 Ra1 136. Kc6 Ke7 137. Kc5 Ra2 138. Kb6 Kd8 139. Kc6 Rh2 1/2-1/2 That looks like an old version (fairly old version) that had a bug in the evaluation code and never could call the EvaluateMate() function. This was fixed several versions back, although I don't remember exactly when. Your game doesn't provide (1) which version and (2) the actual log output which would show what is going on. I just tried a quick check to be sure it still works and all is well. I don't remember exactly what caused this bug, but someone else found and reported it a good while back. 17.10 won't do this.
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