Author: leonid
Date: 19:25:41 07/31/01
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On July 31, 2001 at 18:58:08, Heiner Marxen wrote: >On July 31, 2001 at 15:16:35, Angrim wrote: > >>On July 31, 2001 at 14:07:42, leonid wrote: >> >>>Hi! >>> >>>This position contain few heavy pieces and should be solvable by every program. >>> >>>[D]Rn1rk2r/QB4pN/1pn4p/pN2q1Pb/2P1p3/2p1P1Bq/P4Q1b/1K1R4 w - - >>> >>>Please indicate your result. >>> >>>Thanks, >>>Leonid. >> >>useing pn^2 on an Athlon 650mhz: >> >>proved that move b7xc6 wins, 10 turns >>PN2:4021544 evals, 180919 expands, 23.27 seconds >> >>Angrim > >According to Chest your move is the unique key move for a mate in 9 moves: > >PV: Bxc6+ Nxc6 Rdxd8+ Nxd8 Nc7+ Qxc7 Qxc7 Qd7 Qxd7+ Kxd7 Qf5+ Ne6 Ra7+ Kd8 Qd5+ >Ke8 Qd7# > >Needed 15.6 minutes on a K7/600 with 350 MB hash. >pn^2 appears to be quite a good mate finding method. Probably on this position we have similar search. Mine found mate in 9 moves by brute force in 16 min and 28 sec. LLchess. Celeron 600. No hash. Angrim's program look like to have better chance this time by finding shorter mate by selective search. Mine find mate only in 11 moves in 8 seconds. Cheers, Leonid. >Cheers, >Heiner
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