Author: Dann Corbit
Date: 17:03:47 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.) Chess Tiger Analysis after 4 different choices from that position: [D]8/p7/6kp/1p2p3/1P2P2P/1PP5/5K2/8 b - - ce -142; acd 29; acs 3600; pv h5 c4 a6 c5 Kf7 Kf3 Kf8 Ke2 Ke8 Ke3 Ke7 Kd3 Kd7 Kc3 Ke6 Kc2 Ke7 Kb2 Ke6 Ka3;|h5 [D]8/p7/6kp/1p2p2P/1P2P3/2P5/1P3K2/8 b - - ce -326; acd 26; acs 1; pv Kg5 Kf3 Kh4 b3 Kxh5 c4 Kg5 c5 Kf6 Kg4 Ke6 Kh5 Ke7 Kxh6 Kf6 Kh5 Ke7 Kg6 Ke6 Kg5;|Kg6g5 [D]8/p7/6kp/1p2p3/1P2P2P/2P2K2/1P6/8 b - - ce -142; acd 23; acs 1; pv h5 Ke3 Kf6 b3 a6 c4 Ke6 c5 Kf6 Kf3 Ke7 Ke2 Kd7 Ke3 Ke6 Kd2 Kd7 Ke2 Ke6 Kd1;|h5 [D]8/p7/6kp/1p2p3/1P2P2P/2P3K1/1P6/8 b - - ce -142; acd 24; acs 1; pv h5 b3 Kf6 c4 a6 c5 Ke7 Kf3 Kd7 Ke3 Kc7 Kd2 Kc6 Kc3 Kc7 Kb2 Kd7 Kc2 Kd8 Kd2;|h5
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