Author: Rafael Andrist
Date: 04:54:49 02/16/03
Go up one level in this thread
On February 16, 2003 at 07:20:14, Art Basham wrote: >This one is a real gem! >AS far as I know, > >1. Kf8 is the only move that leads to a mate in 6...! > >[D]6K1/6B1/3pNNk1/8/4P3/8/8/8 w - - 0 1 > >My Fritz 7 finds it for awhiile ..but then changes to Bh8... No problem for Wilhelm: 6K1/6B1/3pNNk1/8/4P3/8/8/8 w - - 0 1 static evaluation: 9.38 Searching... ply time value nodes N nodes Q PV 1 0s 9.41 20 7 Kg8-f8 2 0s 11.11 147 22 Kg8-f8 d6-d5! e4xd5 3 0s 11.12 873 111 Kg8-f8 d6-d5! e4xd5 Kg6-f5! Kf8-e7 4 0s 11.11 4640 617 Kg8-f8 d6-d5! e4xd5 Kg6-f5! Kf8-f7 Kf5-e5! Bg7-f8 5 0s 11.96 25041 2691 Kg8-f8 d6-d5! e4xd5 Kg6-f5! Nf6-g8 Kf5-e4 d5-d6 6 1s 14.81 106416 10291 Kg8-f8 d6-d5! e4xd5 Kg6-f5! d5-d6 Kf5xe6 d6-d7 Ke6-d6 7 3s +# 6 434857 35177 Kg8-f8 d6-d5! e4xd5 Kg6-f5! Kf8-f7 Kf5-e5! Kf7-g6 Ke5-d6! Bg7-h6 Kd6-e5 Bh6-f4+ 8 9s +# 6 1598417 114704 Kg8-f8 d6-d5! e4xd5 Kg6-f5! Kf8-f7 Kf5-e5! Kf7-g6 Ke5-d6! Bg7-h6 Kd6-e5 Bh6-f4+ 9 29s +# 6 5521098 340662 Kg8-f8 d6-d5! e4xd5 Kg6-f5! Kf8-f7 Kf5-e5! Kf7-g6 Ke5-d6! Bg7-h6 Kd6-e5 Bh6-f4+ Wilhelm disables Forward Pruning after finding a mate, so it proves shortest mate = 6 at ply 9. If I enable EGTB access, it takes a bit longer: 6K1/6B1/3pNNk1/8/4P3/8/8/8 w - - 0 1 static evaluation: 9.38 Searching... ply time value nodes N nodes Q PV 1 0s 9.41 20 7 Kg8-f8 2 0s 11.11 147 22 Kg8-f8 d6-d5! e4xd5 3 0s 11.12 898 116 Kg8-f8 d6-d5! e4xd5 Kg6-f5! Kf8-e7 4 1s 12.19 5438 735 Kg8-f8 d6-d5! e4xd5 Kg6-f5! d5-d6 Kf5-e5 5 2s +# 13 30977 3498 Nf6-h5 Kg6xh5 Bg7-f8 Kh5-g4 Bf8xd6 6 5s +# 13 125715 12602 Nf6-h5 Kg6xh5 Bg7-f8 Kh5-g4 Bf8xd6 7 15s +# 6 492328 43111 Kg8-f8 d6-d5! e4xd5 Kg6-f5! Kf8-f7 Kf5-e5! Kf7-g6 Ke5-d6! Bg7-h6 Kd6-e5 Bh6-f4+ regards Rafael B. Andrist
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