Author: Vincent Diepeveen
Date: 08:05:38 04/24/01
Go up one level in this thread
On April 22, 2001 at 23:40:02, Paul Byrne wrote: >On April 22, 2001 at 09:57:10, leonid wrote: > >>Hi! >> >>If you want to solve one mate and say your result, then this is the position: >> >>[D]2R2bNn/Rp1n1k1b/1q1ppB1p/1Np1p1p1/2P1P2P/3P2PB/4Q2K/8 w - - >> >>If you program says nodes/per/second, please indicate it for this position. > >1W. i=448 n=8398 p=0 d=1000000000 t=0.050 >1W. Bxe6 wins! >PN search is typically quite effective on positions like this. 8398 nodes. >My own program G2K on a 1.2 GHz athlon. Very good! don't watch search times btw, my pentiumpro 200 internet computer was swapping quite a bit. diep needs 620k nodes to show a mate score. fail high of course less nodes, but that's not interesting here. That's about 8 seconds on a dual. Amazing PN beats it in this position. Must figure out why DIEP needs so many plies to find this mate looks pretty easy to me to see in qsearch. Perhaps a bug in qsearch code somewhere :) 00:30 0 29502 (0) 2 15.67 Qe2-f2 Kf7-g6 Bh3-f5 e6xf5 Qf2xf5 Kg6-h5 Qf5xd7 ++ h3-e6 00:31 0 31731 (0) 2 16.32 Bh3xe6 Kf7xe6 Qe2-g4 Ke6-f7 Bf6-d8 ++ e2-f3 00:44 0 127707 (0) 2 17.01 Qe2-f3 g5-g4 Qf3xg4 Bh7-f5 e4xf5 Nd7xf6 Ng8xf6 Kf7xf6 Rc8xf8 Nh8-f7 00:47 2 146273 (0) 3 17.86 Qe2-f3 Bh7-f5 Bf6-d8 Kf7xg8 e4xf5 ++ e2-f2 01:17 5 326122 (0) 3 17.87 Qe2-f2 Bh7-f5 Bf6-d8 Kf7xg8 e4xf5 01:30 85 388791 (0) 4 18.10 Qe2-f2 Bh7-f5 Bf6-d8 Kf7xg8 e4xf5 Qb6xa7 Nb5xa7 g5xh 4 g3xh4 ++ e2-f3 01:34 125 401982 (0) 4 18.18 Qe2-f3 Bh7-f5 Bf6-d8 Kf7xg8 e4xf5 Qb6xa7 Nb5xa7 ++ h3-e6 01:42 204 475088 (0) 4 21.97 Bh3xe6 Kf7xe6 Qe2-g4 Ke6-f7 Qg4xd7 Kf7-g6 Ra7xb7 Qb 6xb7 Qd7xb7 Bh7xg8 Rc8xf8 g5xh4 01:56 524 621360 (0) 5 MATE08 Bh3xe6 Kf7xe6 Qe2-g4 Ke6-f7 Qg4xd7 Kf7-g6 Qd7-f5 K g6-h5 g3-g4 Kh5xh4 Bf6xg5 h6xg5 Qf5-f2 Kh4xg4 Ng8-f6 02:11 1775 933805 (0) 6 MATE07 Bh3xe6 Kf7xe6 Qe2-g4 Ke6-f7 Qg4xd7 Kf7-g6 Qd7-f5 Kg6-h5 g3-g4 Kh5xh4 02:37 6156 1501442 (0) 7 MATE07 Bh3xe6 Kf7xe6 Qe2-g4 Ke6-f7 Qg4xd7 Kf7-g6 Qd7-f5 Kg6-h5 g3-g4 Kh5xh4 04:10 22594 3579646 (0) 8 MATE07 Bh3xe6 Kf7xe6 Qe2-g4 Ke6-f7 Qg4xd7 Kf7-g6 Qd7-f 5 Kg6-h5 g3-g4 Kh5xh4 >-paul
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