Author: Heiner Marxen
Date: 11:03:02 10/21/03
Go up one level in this thread
On October 18, 2003 at 10:09:03, F. Huber wrote: >On October 18, 2003 at 09:36:35, leonid wrote: > >>On October 17, 2003 at 23:09:34, Mike Byrne wrote: >> >>>>If somebody want slightly deeper position then try this: >>>> >>>>[D] 1R2NnqN/3pPpQ1/b3nPpp/K2R2bk/4pPrr/6Pp/4B2P/3N4 w - - >>>> >>>>Please indicate Your result. >>>> >>>>Leonid. >>>> >>> >>>Dell Axim Pocket 400 WM 2003 ROM 05 16 MB hash Oc to 472 Mhz >>>Pocket Chess Genius 1.5 >>> >>>Mate-in-8 in 52 seconds (I think it may be shorter) >> >>I just don't know what will be the shortest one and expected that somebody will >>find it. My program solved this position only by selective search, like Your in >>8 moves. By brute force I verified only 5 moves and found that it is no mate >>there. To go deeper could be expensive with my program that use no hash. >> >>Leonid. > >Hi Leonid, > >it´s a mate in 7 (with a few solutions, 4 if I remember right), as my >ChestUCI found in about 15 min (on my slow Celeron/400 - should be less >than 3 min on a CPU of today). > >Regards, >Franz. Five solutions: PV: Rxg5+ hxg5 exf8=Q Qxf8 Qh7+ Qh6 Ng7+ Nxg7 Qxh6+ Kxh6 Nxf7+ Kh7 Rh8# PV: exf8=Q Qxf8 Rxg5+ hxg5 Qh7+ Qh6 Ng7+ Nxg7 Qxh6+ Kxh6 Nxf7+ Kh7 Rh8# PV: Nxf7 Qxf7 exf8=Q Qxf8 Rxg5+ Nxg5 Qxf8 Ne6 f7 g5 f5 e3 Nf6# PV: Ne3 Nxg7 Nxg7+ Qxg7 fxg7 f5 g8=N d6 e8=N Bd8+ Rxd8 g5 Ngf6# PV: Kxa6 Nc7+ Nxc7 Qxg7 fxg7 Ne6 Nxe6 dxe6 Rxg5+ hxg5 Nxf7 gxf4 Rh8# Cheers, Heiner
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