Author: leonid
Date: 12:53:05 04/06/02
Go up one level in this thread
On April 06, 2002 at 14:32:56, John Merlino wrote: >On April 06, 2002 at 07:05:42, leonid wrote: > >>[D]8/8/q4Q2/rBpnqQ2/QNnNbN2/NqrPnQ2/NbrkqB2/QKRqRq2 w - - >> >>Please indicate your result. >> >>Thanks, >>Leonid. > >Chessmaster says Mate in 11 after 48 seconds on a PIII-733. But is that the >shortest mate? I really don't know. I went only 9 moves by brute force and stop there. My program don't use hash and its absence make search slow on similar position. Maybe somebody will run this position on Chest with hash 10 moves deep. This program use hash and have usually good branching factor to do brute force work. My selective (LLchess mate solver) found mate in 11 moves, just like Chessmaster. On Celeron 600Mhz it found mate in 9 seconds. Cheers, Leonid. > >Time Depth Score Positions Moves >0:07 1/3 6.58 440512 1.Nxb3+ Rxb3 2.Qxe2+ Qfxe2 3.Rxe2+ > Qxe2 4.Rxc2+ Kd1 5.Rc1+ Bxc1+ 6.Qxb3+ > Nc2 7.Nxc4 Qxa1+ 8.Qxa1 Bxf5 9.Nxe2 > Rxb5 >0:34 1/4 9.82 2017709 1.Nxb3+ Rxb3 2.Qxe2+ Qfxe2 3.Rxe2+ > Qxe2 4.Rxc2+ Kd1 5.Rc1+ Bxc1+ 6.Qxb3+ > Nc2 7.Nxc4 Qexf6 8.Qfxf6 Rxa2 9.Nxc2 >0:48 1/4 Mate11 2932963 1.Nxc4+ Qxc4 2.Bxe3+ Nxe3 3.Qxe3+ > Kxe3 4.Nfd5+ Qexd5 5.Ndxc2+ Rxc2 > 6.Nxd5+ Kd2 7.Rxe2+ Qfxe2 8.Qf4+ > Ke1 9.Q6h4+ Qf2 10.Qhxf2+ Rxf2 > 11.Qxd1# >1:34 2/5 Mate11 6346069 1.Nxc4+ Qxc4 2.Bxe3+ Nxe3 3.Qxe3+ > Kxe3 4.Nfd5+ Qexd5 5.Ndxc2+ Rxc2 > 6.Nxd5+ Kd2 7.Rxe2+ Qfxe2 8.Qf4+ > Ke1 9.Q6h4+ Qf2 10.Qhxf2+ Rxf2 > 11.Qxd1# > >jm
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