Author: Sylvain Renard
Date: 12:21:18 07/12/99
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On July 12, 1999 at 10:16:11, Robert Hyatt wrote: >On July 12, 1999 at 03:46:02, Sylvain Renard wrote: > >>Using Crafty 16.5T (Fritz interface) with endgame tablebases, >>I have noticed this bug (easy for me, my program has the same!!) : >> >>Start position: >> >>4k3/8/6P1/4K1P1/8/8/8/8 w - - 0 1 >> >>White: Ke5, pawns g5 & g6 >>Black: Ke8 >>white to move (machine = black, white = weak player!). >>1.Kd6?? (there are several wining moves!) 1...Kf8= 2.Ke5 Ke8?? leading >>to the start position, so Crafty 16.5T (Fritz interface) evaluation is 0.00 , >>because of the repetition of the position! >> This bug is not present in "normal" Crafty 16.11 (Winboard interface) so I >>wanted to ask Mr Hyatt his explanation. >> Thank you and best regards, >> Sylvain Renard > > >There doesn't appear to be anything wrong. Crafty considers two repetitions a >draw, as it always has. In that regard, the above is a draw as far as it is >concerned. A program should never play a losing move in this position! Now the opponent can play 3.Ke6, 3.Kf5 or even 3.g7 and win. I still consider that this is a bug!
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