Author: Bruce Moreland
Date: 19:33:41 06/05/00
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On June 05, 2000 at 18:59:41, blass uri wrote: >On June 05, 2000 at 18:35:10, blass uri wrote: > ><snipped> >>[D]5k2/7K/6P1/1p6/1P3p2/1P6/8/8 b - - 0 1 >> >>In this position the static evaluation of Crafty is advantage for black because >>it does not know that the white pawn cannot be stopped. >> >>It plays f3 with 4.96 pawns advantage for black at depth 1. >>It is possible to know by evaluation that the white pawn also cannot be stopped >>because the white king controls g7 and g8 > >It is possible to use the following simple rule: >White pawn in the 6th rank is unstoppable if the white king control the queening >square. > >It is possible to see also by evaluation that black will have to waste tempo >and cannot promote the passed pawn because of the square of the black king. > >Uri This is a fine rule, but white doesn't get to this position since after Bxh6 Kxh6, black can block the pawn if he's willing to give up his own pawn. I think it's important to given bonuses in positions like the one shown, where the K is supporting the P, and not just in K+P endings, either. But really that's not the hard part of this. What ends up happening is that black will figure out early on that he has to give up the f-pawn. That resulting position is harder than this one. bruce
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