Author: Anthony Cozzie
Date: 16:33:52 11/02/03
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On November 02, 2003 at 17:12:38, Will Singleton wrote: >On November 02, 2003 at 16:52:49, Gerd Isenberg wrote: > >><snip> >>>In the same vein, the following position has always been a nightmare for Tiger: >>> >>>[D]8/1KP5/3q2k1/8/6p1/8/8/8 b - - >>> >>>This position comes from a real game between the Modular Game System Sargon 2.5 >>>and Mike III, played in September 1980 during the Personal Computer World Fair. >>>Mike III continued the game with a long series of checks leading to a draw. >>> >>>Chess Tiger is not smarter than Mike III here. It is something that I had fixed >>>in the 16 bits version, to the expense of some added complexity in the passed >>>pawns evaluation code. I have not transfered this code to the 32 bits version >>>because it was not general enough (add another black pawn and the code did not >>>work). >>> >>>I am interested in results of other (amateur and commercial) programs. >>> >>> >>> >>> Christophe >> >>Hi Christophe, >> >>IsiChess on AMD XP2.6+ first shuffles around with Qb4+, Qxc7 and Qd7. >>After 5 seconds at depth 13 Qxc7 came up. Mate in 14 resp. 12 after one minute >>and 1:10. I guess a matter of won KPK eval. >> >>Cheers, >>Gerd > >Sure, but I'm not sure CT was referring to finding the mate as the problem. CT >seems to have some problem understanding that KQK is better than KQKP, that's >all I can figure. > >Will Sounds like a job for interior node recognizers: If(black has no pieces && black_not_stalemated && white_has_mating material_not_counting_pawns) eval = 1/2 checkmate (or some such) anthony
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