Author: blass uri
Date: 11:19:03 09/10/98
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On September 10, 1998 at 13:05:26, Howard Exner wrote: >Francois, > >Here is an offshoot related to your correspondence position in the >thread, "Help with Position". The pattern of pawns on the a file lends >itself to a neat drawing position. A typical draw position is this: > >8/p1k5/P7/2K5/8/8/6B1/8 b - - id "draw"; > >There is no way to break through for white despite the bishop up. >It is similar to the bishop ending with the wrong colored queening square. >In this case of course the queening square is the same color as the bishop but >white's pawn being advanced to a6 ruins any chance of a victory. Will >most programs wrongly eval this as around +3 ? most program eval this more than +3 > >Here are some positions that might be fun to test on computers. > >Kc6 or Kc7 draws while Kc5 loses: >8/p4p2/Pk3K2/8/8/3B4/8/8 b - - am Kc5; > >Kxf7 draws but Ke7 wins as the King will reach d8: >8/p4p2/P4K2/2k5/8/3B4/8/8 w - - bm Ke7; Fritz5 find Ke7 after 1 minute and 56 seconds Junior5 cannot find it in reasonable time. Here is another draw position: white has king bishop and 3 pawns against king and 2 pawns and cannot win: white's pawns:a5,b6,c7 black's pawns: b7,a6 white bishop in black square and the black king at c8 or d7 (the white king can be in the place you want except a8,b8,a7) Uri
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