Author: Heiner Marxen
Date: 10:46:06 10/07/01
Go up one level in this thread
On September 30, 2001 at 05:43:43, Tim Foden wrote: >On September 29, 2001 at 07:33:59, leonid wrote: > >>Hello! >> >>This mate is probably very easy. There are good chance that you will solve it >>even by brute force wihtout too much waiting. > >As other post pointed out, I'm afraid this one isn't as easy as you thought :) Yes. Chest agrees with you :-) >>[D]RQ2rqbb/4p2k/1KQQqQ1n/1R2qqpq/1P3P2/1BBPNN2/nq6/rq4QQ w - - >> >>Please indicate your result. > >GLC215-pr9, 920MHz Duron, 96MB hash claims Nxg5+ is a mate in 11, after 10m 3s. > >Cheers, Tim. Chest on K7/600 with 350 MB hash needs 3.6 days (!) to be sure about it. 1.Nxg5+ is the only key move for mate in 11. Interestingly, Chest gives the exact same PV as GLC below. To prove that there is no mate in 10 Chest needs more than 12 hours, already. I wonder how Leonid did this one with "brute force search". Leonid? Cheers, Heiner >~~~~~~~~~ > >Analysis: > > Game stage: Opening > Current eval: -8.66 > Ply Time Score Nodes Principal Variation > 2 0.10 -- 8234 Nxe5 (a=-3.07 b=-2.27 e=-3.07) > 2 0.10 -8.452 8881 Nxe5 exd6 Nxf5 Rxb8+ > 2 0.11 -5.851 11356 Nxg5+ Qhxg5 Qdxe5 Rxb8+ Rxb8 Bxf6 Nxf5 > 2 0.12 ++ 12757 Qxf5+ (a=-321.00 b=-3.07 e=-3.07) > 2 0.13 -2.951 15129 Qxf5+ Qfxf5 Qxh5 Rxb8+ Rxb8 > 2 0.17 -2.951 17202 Qxf5+ Qfxf5 Qxh5 Rxb8+ Rxb8 > 3 0.34 -- 68575 Qxf5+ (a=-3.35 b=-2.55 e=-3.35) > 3 0.39 -3.493 86623 Qxf5+ Qe6xf5 Bxg8+ Kxg8 Qc4+ Qhf7 fxe5 Rxb8+ Qxb8 > 3 0.52 -3.493 127462 Qxf5+ Qe6xf5 Bxg8+ Kxg8 Qc4+ Qhf7 fxe5 Rxb8+ Qxb8 > 4 1.78 -- 600582 Qxf5+ (a=-3.89 b=-3.09 e=-3.89) > 4 1.85 -6.535 635792 Qxf5+ Qe5xf5 Bxe6 Rxb8+ Qxb8 Qxb8+ Rxb8 Qxh1 Bxb2 > Qhxg1 Bxf5+ Nxf5 > 4 2.38 -5.579 870797 fxe5 Qexf6 Bxg8+ Qxg8 Nxg5+ Qhxg5 exf6 Rxb8+ Rxb8 > 4 2.71 -5.150 995427 Rxe5 Rxb8+ Qxb8 Qxb8+ Rxb8 Qfxf6 Rxe6 Qxh1 Bxb2 > Qfxb2 Rxe7+ > 4 2.82 -5.150 1019242 Rxe5 Rxb8+ Qxb8 Qxb8+ Rxb8 Qfxf6 Rxe6 Qxh1 Bxb2 > Qfxb2 Rxe7+ > 5 3.28 ++ 1173106 Rxe5 (a=-5.55 b=-4.75 e=-4.75) > 5 4.29 -3.391 1523440 Rxe5 Bxf6 Qxh5 Rxb8+ Rxb8 Qxd6 Rxf8 Qxc3 Nxf5 > Qdxc6+ Qxh6# > 5 10.33 -3.391 3920728 Rxe5 Bxf6 Qxh5 Rxb8+ Rxb8 Qxd6 Rxf8 Qxc3 Nxf5 > Qdxc6+ Qxh6# > 6 12.62 -3.676 4780613 Rxe5 Qf5xf6 Rxe6 Rxb8+ Rxb8 Qxh1 Rxf6 Qhxg1 Nxg1 > Nxc3 Rxh6+ > 6 29.17 -3.492 11526k Qxf5+ Qfxf5 Bxe5 Rxb8+ Rxb8 exd6 Qxh5 Qxg1 Nxg1 > 6 39.50 -3.492 15950k Qxf5+ Qfxf5 Bxe5 Rxb8+ Rxb8 exd6 Qxh5 Qxg1 Nxg1 > 7 41.31 ++ 16725k Qxf5+ (a=-3.89 b=-3.09 e=-3.09) > 7 53.29 -1.842 21636k Qxf5+ Qfxf5 Rxe5 Rxb8+ Rxb8 Qxg1 Qxh5 Qxe3+ Rxe3 > Qxd6 Bxb2 Qxb8+ > 7 3:28 -1.842 84447k Qxf5+ Qfxf5 Rxe5 Rxb8+ Rxb8 Qxg1 Qxh5 Qxe3+ Rxe3 > Qxd6 Bxb2 Qxb8+ > 8 3:37 ++ 88033k Qxf5+ (a=-2.24 b=-1.44 e=-1.44) > 8 5:22 +1.024 131812k Qxf5+ Qfxf5 Rxe5 Rxb8+ Rxb8 Qxc3 Qxe7+ Qff7 Qcxe6 > Qxe5 fxe5 Qxh1 Q6xf7+ Bxf7 Nxg5+ > 8 10:03 +Mate11 252324k Nxg5+ Qfxg5 Qce4+ Nf5 Qxh5+ Qxh5 Qexf5+ Qhxf5 Qh4+ > Qh5 Qxh5+ Qxh5 Rxh5+ Qfh6 Rxh6+ Kxh6 Qg5+ Kh7 > Qh5+ Qh6 Qhxh6# > 8 11:16 +Mate11 305358k Nxg5+ Qfxg5 Qce4+ Nf5 Qxh5+ Qxh5 Qexf5+ Qhxf5 Qh4+ > Qh5 Qxh5+ Qxh5 Rxh5+ Qfh6 Rxh6+ Kxh6 Qg5+ Kh7 > Qh5+ Qh6 Qhxh6# > 9 15:56 +Mate11 535047k Nxg5+ Qfxg5 Qce4+ Nf5 Qxh5+ Qxh5 Qexf5+ Qhxf5 Qh4+ > Qh5 Qxh5+ Qxh5 Rxh5+ Qfh6 Rxh6+ Kxh6 Qg5+ Kh7 > Qh5+ Qh6 Qhxh6# > 9 24:34 +Mate11 947530k Nxg5+ Qfxg5 Qce4+ Nf5 Qxh5+ Qxh5 Qexf5+ Qhxf5 Qh4+ > Qh5 Qxh5+ Qxh5 Rxh5+ Qfh6 Rxh6+ Kxh6 Qg5+ Kh7 > Qh5+ Qh6 Qhxh6# > 10 26:35 0/96 Nxg5+ >exit > local: t=26:45 nps=658130.5 n=1056311358 (13.8% / 86.2%) fh=94.6% > total: t=26:45 nps=658130.5 n=1056311358 draws=208762 > trans: probes=108078258 hits=10516687 (9.73%) draft=7001585 (6.48%) > tcuts: exact=181 (0.00%) upper=4575419 (4.23%) lower=1340368 (1.24%) > tstor: exact=685 (0.00%) upper=60278146 (76.19%) lower=18837836 (23.81%) > ext: check=100911703 recap=4731596 ppush=107552 1rep=3515341 thrt=0 > q-moves: gen=930595119 tested=174168516 made/un=97691166 max-dep=10 > max eval diff: part-1=2.176 part-2=2.776
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.