Author: Robert Hyatt
Date: 06:31:16 10/09/98
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On October 09, 1998 at 08:36:52, James T. Walker wrote: >I was testing Crafty 15.20 yesterday and found it could not perform a Knight and >Bishop mate. I then downloaded some of the tablebases (14) including the >KBNK tablebase. Then I tried to test Crafty again for Knight & Bishop mate. It >got worse and gave up the Knight in one try. In other attempts it announced >mate 1-0 and was no where close to mate. I set the egtb=4 in the rc file. I >don't know what I'm doing wrong. Any help is appreciated . >Jim Walker first, did you decompress the tablebases? (gunzip). second, given a few seconds of time per move, it should mate with B+N without tablebases. At least mine has done this many times. Without a significant amount of time, however, it can't mate from the worst-case type positions (mate in 31) in under 50 moves, as it will make one key mistake that makes this take about 60-65 moves. But I've never seen it outright fail. Bogus mates, however, are only caused by non-uncompressed databases, which will wreck everything...
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