Author: James Robertson
Date: 21:47:46 11/19/98
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On November 19, 1998 at 22:34:09, James B. Shearer wrote: > I was playing a Crafty clone on ICC and the following position arose: > >setboard r5k1/ppp1Q2p/1q4p1/8/8/2P1B3/bP4P1/4R1K1 b - - 0 24 > >The clone played qb6xb2 which loses quickly after be3-d4. I checked the >position after the game was over with crafty 15.15 on my k6-233. Crafty seems >to take an inordinate amount of time to reject qxb2 (over 100 seconds). Every >other program I have (cm5500, rebel8, rebel decade20, fritz4) either never >considers qxb2 or rejects it quickly (under 1 second). Is this a bug? > James B. Shearer Perhaps a null move problem (unlikely)? The mate is at ply 12 although Black should realise that it loses it's queen (even if it doesn't see the mate) by ply 8. Ply 8 is when Crafty finds 1. ... c5 (after 28 seconds on my P233). GnuChess is another program that has problems with this position. James
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