Author: Will Singleton
Date: 20:51:34 11/02/03
Go up one level in this thread
On November 02, 2003 at 22:50:24, Christophe Theron wrote: >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 > > > >Does your program play this correctly in a very short time? Does it see an >endless sequence of checks with big score for white, or does it show the queen >capturing the pawn at some point in the main line? > >Without letting it think until it can actually see the repetition of course... > > > > Christophe It shows the capture, as far as I can tell. Note that Amateur always shows a promotion as a queen move, which is wrong, but what the hell. 13891 >first : go 14094 <first : 6 1573 17 53185 Qd7 Kb8 Qb5 Ka8 Qe8 Kb7 Qe7 Kb8 14188 <first : 7 1564 23 82293 Qd7 Kb8 Qb5 Ka8 Qd5 Kb8 Qd6 Kc8 Qc6 14641 <first : 8 1469 69 239057 Qd7 Kb8 g3 Qc8 Qxc8 Kxc8 g2 Kb7 Qg1 Kc6 Qe1 14844 <first : 9 1471 90 316799 Qd7 Kb8 g3 Qc8 Qxc8 Kxc8 g2 Kb7 Qg1 Kc6 Kf5 Kd5 Qd1 Kc4 15047 <first : 10 1471 108 383464 Qd7 Kb8 g3 Qc8 Qxc8 Kxc8 g2 Kb7 Qg1 Kc6 Kf5 Kd5 Qd1 Kc4 15344 <first : 11 1473 139 514043 Qd7 Kb8 g3 Qc8 Qxc8 Kxc8 g2 Kb7 Qg1 Kc6 Kf5 Kd5 Qd1 Kc4 Ke4 16016 <first : 12 1473 207 785975 Qd7 Kb8 g3 Qc8 Qxc8 Kxc8 g2 Kb7 Qg1 Kc6 Kf5 Kd5 Qd1 Kc4 Ke4 Kc3 18375 <first : 13 1473 443 1716014 Qd7 Kb8 g3 Qc8 Qxc8 Kxc8 g2 Kc7 25125 <first : 13 1475 1118 4647563 Qxc7 Kxc7 g3 Kc8 g2 Kc7 Qg1 Kd6 Qd4 Ke6 Kg5 Kf7 Qd7 Kf8 Kf4 Kg8 Qd1 27953 <first : 14 1475 1400 5817253 Qxc7 Kxc7 g3 Kd6 32047 <first : 14 1476 1808 7560993 Qb4 Ka8 Qc4 Kb7 Kf5 Qc8 Qxc8 Kxc8 35922 <first : 15 1476 2198 9252043 Qb4 Ka8 Qc4 Kb7 Kf5 Qc8 Qxc8 Kxc8 82203 <first : 16 1476 6825 32304317 Qb4 Ka8 Qc4 Kb7 Kf5 Qc8 Qxc8 Kxc8 g3
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