Author: Dann Corbit
Date: 12:39:10 05/27/02
Go up one level in this thread
On May 27, 2002 at 14:31:16, Bo Sjögren wrote: >Many years ago I was outplayed for most of the game, but my opponent >allowed me to "close the shop": > >[D]8/p7/6kp/1p2p3/1P2P2P/2P5/1P3K2/8 w - - > >White must play 1.h5+!, which I think we concluded after the game wins >rather easily. But instead he played 1. b3?? and after 1...h5! he >thought for five minutes, and shook his head (and my hand)... > >Does the current crop of engines recognise the danger? It seems CT14 >prefers 1.h5+, but is almost as happy with 1.b3 -- just a one minute >check. Will any engine conclude that 1.b3 is indeed a draw, and how >will it do it; by some kind of intelligence, or brute force? (I of >course have the feeling that brute force is not enough for this type >of problem.) > Beowulf took 38 seconds: Position 1 - White to play -------------------------- ID = FEN = 8/p7/6kp/1p2p3/1P2P2P/2P5/1P3K2/8 w - - . . . . . . . . p . . . . . . . . . . . . . k p . p . . p . . . . P . . P . . P . . P . . . . . . P . . . K . . . . . . . . . . Current Position = 0.95 Number of Possible Moves = 11 13 170 79 201525 b3 h5 c4 Kf7 Ke2 Ke8 Ke1 Kd7 c5 Kc6 Kd2 a5 Kc3 14 170 157 407224 b3 h5 c4 Kf7 Ke3 Ke8 cxb5 Kd7 Kd3 Kc7 Kc4 Kd7 15 170 211 549067 b3 h5 c4 Kf7 Ke3 Ke8 cxb5 Kd7 Kd3 Kc7 Kc4 Kd6 Kc3 Kc7 Kc4 &rep. 16 170 319 824487 b3 h5 c4 Kf7 Ke3 Ke8 cxb5 Kd7 Kd3 Kc7 Kc4 Kd6 Kc3 Kc7 Kd3 Kc8 Kc4 Kd7 Kd5 a5 17 170 516 1317513 b3 h5 c4 Kf7 Ke3 Ke8 cxb5 Kd7 Kd3 Kc7 Kc4 Kd6 Kc3 Kc7 Kd3 Kc8 Kc4 Kd7 Kd5 a5 18 170 827 2041216 b3 h5 c4 Kf7 Ke3 Ke8 c5 a6 Kd3 Kd7 Ke3 Kc6 Kd3 Kb7 19 170 1680 4040637 b3 h5 c4 Kf7 Ke3 Ke8 c5 a6 Kd3 Kd7 Kc3 Kc6 Kd3 Kb7 19 171 3794 8512384 h5+ Kxh5 b3 Kh4 c4 Kg5 Kg2 Kf6 Kg3 Ke6 Kh3 h5 Kh4 Kd7 Kxh5 Kc6 c5 a5 bxa5 Kxc5 b4+ Kd6 20 171 9149 19778077 h5+ Kg5 Kf3 Kxh5 b3 Kh4 c4 Kg5 Kg2 Kf6 Kh3 Ke7 Kg3 Kd6 Kg4 Ke6 Kh5 a6 Kg4 Kd7 Kh5 Ke6 &rep. 21 171 13681 29177073 h5+ Kg5 Kf3 Kxh5 b3 Kh4 c4 Kg5 Kg2 Kf6 Kh3 Ke7 Kg3 Kd6 Kg4 Ke6 Kh5 Kd7 Kxh6 Ke7 Kh5 Kd6 Kg4 bxc4 bxc4 Ke7 c5 a6 Kf3 Ke6 22 171 26763 56797301 h5+ Kg5 Kf3 Kxh5 b3 Kh4 c4 Kg5 Kg2 Kf6 Kh3 Ke7 Kg3 Kd6 Kg4 Ke6 Kh5 Kd7 Kxh6 Ke7 Kh5 Ke6 c5 Kd7 Kh4 a6 Kg4 Ke 6 Kf3 Kd7 Ke3 Kc6 Kd3
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