Author: José Carlos
Date: 08:14:19 05/06/03
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On May 06, 2003 at 08:55:07, Robert Hyatt wrote: >On May 06, 2003 at 07:05:02, Jarkko Pesonen wrote: > >>Crafty 19.3 ends up in this position >> white black >> 1 d5 e5 >> 2 c6+ bxc6 >> 3 bxc6+ Kc8 >> 4 d6 e4 >> 5 Kd4 h5 >> 6 g4 hxg4 >> 7 hxg4 f4 >> 8 Kxe4 ... >> >>[D]2k5/8/2PP4/6p1/4KpP1/8/8/8 b >> >> 21-> 1:40 6.47 1. ... Kd8 2. Kd4 Kc8 3. Kd3 Kd8 4. >> Ke4 Kc8 5. Kf3 Kd8 6. Kf2 Kc8 7. Ke2 >> Kd8 8. Kd3 Kc8 9. Kc3 Kd8 10. Kd2 Kc8 >> 11. Ke1 f3 >> >>Seems that crafty isn't doing any progress and score is totally wrong(seems to >>be draw). >> >>Is there an easy way to fix this? >>Or is this some kind off odd situation that is so rare that it is not >>worth fixing? >> >>Jarkko > > >That can be fixed. It is the classic problem of two connected passed pawns >being valued too high in a king and pawn ending. If they were separated, >white would win easily. But together, they can be stopped. I will look >at this and fix it. The code is already there, it just has a hole that I >apparently overlooked. These kind of position is very tricky. In some cases, white can forget about the black pawns and go with the king to help his pawns. AFAIK it can only be safely solved by search. José C.
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