Author: Robert Hyatt
Date: 07:26:58 12/08/99
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On December 08, 1999 at 09:17:07, Bernhard Bauer wrote: >On December 08, 1999 at 07:32:33, Alexander Kure wrote: > >>Hi everybody, >> >>When working through Nimzo's games he recently played on ICC i came across a >>game he played against Crafty which led to the following pawn endgame (Crafty >>white, Nimzo black): >> >>6k1/p6p/4p1p1/8/8/1P6/P5PP/5K2 w - - 0 39 >> >>The resulting position is a 'simple' win for white dispite the fact that black >>has a passed center pawn. White's pawn majority on the queenside will lead to a >>remote passed pawn which will result in a win for white. >>I am interested in the static evaluation of this position of various chess >>programs. Which programs recognize that this position is a win for white? >> >>The next step is how to avoid this position when confronted with it in the >>search. Here is the position a few moves ago: >> >>6k1/p4p1p/4B1p1/8/8/1P6/P5PP/2q2QK1 b - - 0 37 >> >>Black just checked White's king on c1 and White defended by moving his queen to >>f1. >>Now the question is: Which programm with black to move avoids the queen exchange >>which leads to the lost pawn endgame above? >>Now instead of exchanging queens by 1...Qxf1?? 2.Kxf1 fxe6 leading to the lost >>pawn endgame above the sequence 1...Qe3+ 2.Kh1 (2.Qf2 Qc1 repeats the position >>or 2.Qf2 Qxe6!?) and now 2...fxe6! (2...Qe6 is not so intersting) will lead to >>an interesting position. >> >>Greetings >>Alex > >I don't think that Crafty sees the win in your first position, but it shows >a small advantage for white - score=0.87. >In your second position Crafty will avoid the exchange of queens. Instead it >likes 1...Qc5 with a score of zero. >1. ... Qc5+ 2. Qf2 Qc1+ 3. Qf1 >Kind regards >Bernhard In the first position, you missed his point. Many programs would say black is better due to the passed pawn. Crafty understands the distant potential passed pawn however, and thinks white is better.
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