Author: Uri Blass
Date: 18:37:55 12/26/03
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On December 26, 2003 at 18:10:51, Jim Monaghan wrote: >In this study: > >[D]8/5B2/4P3/8/8/4k1p1/6P1/3b3K w - - 0 1 > >There are stalemate and underpromotion themes. >First off, 1.Kg1? allows 1...Bb3 pinning the e-pawn. >Also, 1.e7? Kf2 2.e8=Q Bf3 3.Bd5 Bxg2+ 4.Bxg2 stalemate. >The right way is 1.Be8! Kf2 2.Bc6 Be2 3.e7 Bf1 4.e8=N! and White wins by >bringing his knight to e4. > >My question is that both Ruffian and Crafty perfer 4.e8=B? both giving high >scores. Yace gets it right with the knight underpromotion. Obviously with >4.e8=B, 4...Bxg2+ is a draw. I don't have tablebases installed on this PC. >Anyone know what's going on? Why no contempt factor for bishops of the same >colour? > >Jim Maybe because 2 bishops with the same color is not a practical problem in games so programmers do not care about it. I do not find it strange that programs do not know something that almost never happen in games. programmers care more about practical problems and mistakes that their program does in games. Uri
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