Author: Jason Williamson
Date: 10:15:22 04/15/01
Go up one level in this thread
On April 15, 2001 at 12:32:17, Antonio Senatore wrote: >While I was testing the custom personality "El Rey" against the default >Chessmaster personality happened the next position: > >Celeron 500 -128 MB Ram - 32 MB Hash - Ponder OFF - 40 mov /40 min > >[Event ""] >[Site ""] >[Date "2001.4.15"] >[Round ""] >[White "El Rey"] >[Black "Chessmaster#0"] >[TimeControl "40/2400"] >[Result "?"] > >1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. Nbd2 cxd4 8. >Nxd4 Nbd7 9. f4 e5 10. Nf5 b5 11. Qf3 Ra7 12. Be2 g6 13. fxe5 Nxe5 14. Qf4 Neg4 >15. Bxg4 Nxg4 16. Qe4+ Be7 17. Qc6+ Kf8 18. Qc3 Rg8 19. Nxe7 Rxe7 20. h3 Ne5 21. >b3 a5 22. Ne4 b4 23. Qd4 Kg7 24. Nf6 Rh8 25. Nd5 Re6 26. Bb2 Bb7 27. Rad1 Bxd5 >28. Qxd5 Qxd5 29. Rxd5 Rhe8 30. Rxa5 Kg8 31. Ra7 R6e7 32. Rxe7 Rxe7 33. Bd4 f5 >34. Bc5 Rb7 35. Rd1 Rb5 36. Bd6 Nf7 37. Bg3 Ra5 38. Rd2 Kg7 39. Re2 Ne5 40. e4 >fxe4 41. Rxe4 Nc6 42. Rc4 Ra6 43. Rc2 Kf6 44. Rd2 Kf5 45. Rd6 g5 46. Rh6 Ke4 47. >Bc7 Kd3 48. Bd8 Kc2 49. Bxg5 Kb1 50. Rxh7 Kxa2 51. Kf2 Kxb3 52. g4 Kc4 53. Bf6 >b3 54. h4 Ne7 55. g5 Nd5 56. Be5 Ra2+ 57. Kf3 b2 58. Bxb2 Rxb2 59. Rf7 Rb3+ 60. >Kg4 Kd4 61. h5 Ke5 62. h6 Rb4+ 63. Kg3 Rb3+ 64. Kf2 Rb2+ 65. Kf1 Ne3+ 66. Ke1 >Ng2+ 67. Kd1 Ne3+ 68. Kc1 Rh2 69. h7 Nd5 70. g6 Ke6 71. Rb7 Kd6 72. Ra7 Ke5 73. >Kd1 Nc3+ 74. Ke1 Rh1+ 75. Kf2 Kf6 76. g7 Rxh7 77. g8=Q Rxa7 78. Qd8+ Re7 79. >Qd4+ Kf5 80. Qxc3 > >[D] 8/4r3/8/5k2/8/2Q5/5K2/8 b > >This is a basic ending and at this position any chess program with tablebases >says that "El Rey" gives mate in 29 moves. > >The game followed of this way: > >80...Re4 81. Qc8+ Kf4 82. Qc6 Rd4 83. Qe6 Rd2+ 84. Ke1 Rd4 85. Kf1 Kf3 86. Qf5+ >Ke3 87. Kg2 Re4 88. Qc5+ Rd4 89. Kf1 Kd3 90. Qe5 Re4 91. Qf6 Ke3 92. Qd6 Rf4+ >93. Ke1 Rc4 94. Qd1 Rc5 95. Qb3+ Kd4 96. Kd2 Rd5 97. Qc2 Rd6 98. Qc7 Rd5 99. >Qf4+ Kc5+ 100. Ke3 Rd1 101. Qh4 Rd7 102. Qf6 Rd1 103. Qc3+ Kd6 104. Ke4 Rh1 105. >Qe5+ Kd7 106. Qg3 Kc6 107. Qf2 Rh6 108. Qg2 Kb6 109. Qg3 Rh1 110. Qf3 Rh4+ 111. >Kd5 Rb4 112. Qf6+ Ka5 113. Qc3 Ka4 114. Qd2 Kb3 115. Qd3+ Kb2 116. Qf3 Kc2 117. >Qe3 Rb7 118. Kd6 Rb8 119. Ke7 Rb7+ 120. Ke6 Rb1 121. Qe2+ Kc3 122. Ke5 Rb2 123. >Qa6 Rh2 124. Kf4 Rb2 125. Qa1 Kb3 126. Qf1 Ka4 127. Qa6+ Kb4 128. Qd3 Rf2+ 129. >Qf3 Rxf3+ 130. Kxf3 1/2-1/2 > >Draw! That means Chessmaster doesn't know how to give mate with a Queen against >a Rook. Also means that Chessmaster must support the Nalimov's tablebases if it >wants to be a top chess program. It doesn't serve to have an engine with a >fantastic middlegame like TheKing if later, in the ending, it cannot take out >profit of that advantage. This is one (more) of the trivialities that make that >Chessmaster is not 30-50 elo points stronger. > >Antonio Actually, I wouldn't be terribly surprised if alot of the top engines have difficulty in mating here without tablebases. This ending is not straight forward, and it is easy to make a few in accourate moves and poof, you can no longer mate in 50. JW
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