Author: Steven J. Brann
Date: 13:43:48 01/26/03
Go up one level in this thread
On January 26, 2003 at 08:49:28, Lyn Harper wrote: > > [D]3r2k1/5p2/3R2p1/2rRp1b1/2q1P1Pp/3Q3P/6P1/3N3K b > > Interesting position solved by Boris Gelfand in 1999 in his game against > Sergei Movsesian. > It's a mate in 11. My mid range comp (slow P4) took 1min33secs running CM9K. > How does yours go? Black to move, of course. CM9000 certainly shines here. Finds mate in 11 in 37 seconds on my P4 1.9G computer. Default personality except for SS=14 and 256MB of hash. I've found that increasing the selective search usually decreases mate solving times. Time Depth Score Positions Moves 0:00 1/6 -10.45 26691 1...Rxd5 2.Rxd8+ Rxd8 3.Qf3 Rd3 4.Ne3 Rxe3 0:00 1/7 -11.21 51513 1...Rxd5 2.Rxd5 Rxd5 3.Qf3 Rd3 4.Kg1 Rxf3 5.gxf3 0:00 1/8 -11.40 78516 1...Rxd5 2.Rxd5 Rxd5 3.Qf3 Rd3 4.Kg1 Rxf3 5.gxf3 Qe2 0:01 1/9 -11.44 131391 1...Rxd5 2.Rxd5 Rxd5 3.Qf3 Rd3 4.Ne3 Rxe3 5.Qd1 Qxe4 0:01 1/10 -11.67 234574 1...Rxd5 2.Rxd5 Rxd5 3.Qf3 Rd3 4.Ne3 Rxe3 5.Qf2 Qxe4 6.Kh2 Re2 0:04 1/11 -13.90 743101 1...Rxd5 2.Rxd5 Rxd5 3.Qf3 Rd3 4.Kg1 Rxf3 5.gxf3 Qc1 6.Kg2 Qxd1 7.Kf2 Qd2+ 8.Kf1 0:09 1/12 -15.10 1950297 1...Rxd5 2.Rxd5 Rxd5 3.Ne3 Qxd3 4.Nxd5 Qxe4 5.Nf6+ Bxf6 6.Kh2 Qf4+ 7.Kh1 Qd2 8.Kh2 e4 0:28 1/13 -Mate12 7144098 1...Rxd5 2.Rxd5 Rxd5 3.Qxc4 Rxd1+ 4.Kh2 Bf4+ 5.g3 hxg3+ 6.Kg2 Rd2+ 7.Qe2 Rxe2+ 8.Kf1 Rd2 9.h4 g2+ 10.Kg1 Be3+ 11.Kh2 g1=Q+ 12.Kh3 Qg2# 0:37 1/14 -Mate11 9914560 1...Rxd5 2.Rxd5 Rxd5 3.Qxc4 Rxd1+ 4.Kh2 Bf4+ 5.g3 hxg3+ 6.Kg2 Rd2+ 7.Qe2 Rxe2+ 8.Kg1 Be3+ 9.Kf1 Rd2 10.Ke1 g2 11.h4 g1=Q# Steve
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