Author: Ricardo Gibert
Date: 14:25:22 12/28/01
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On December 28, 2001 at 17:13:01, Ricardo Gibert wrote: >On December 28, 2001 at 15:27:43, Rafael Andrist wrote: > >>On December 28, 2001 at 09:10:27, Steffen Jakob wrote: >> >>>Hi! >>> >>>Today Hossa played a blitz game with Tinker at ICC where a KBPKP endgame was on >>>the board: >>> >>>[D]8/8/p4b1P/3K4/8/8/8/1k6 b >>> >>>Hossa evaluates this as a win for black, because the black pawn has a black >>>promotion square and there is no white pawn on the b file in front of the black >>>pawn. Unfortunately this position is a draw. Can you define a rule for such a >>>position class ("search will do it" doesn't count; >> >>my prog needs 7 ply and a bit less than a second to see the draw. Can you please >>post the game + time? > >Very impressive! ;-) > >Unfortunately, after 1...a5 2.Kc4 Kb7 3.Kb5 Kb3 4.h7 a4 wins. oops! this analysis refers to the next diagram. Sorry, never mind. I cut and paste paste badly. > >> >>> at least the big score I gave >>>for this position costed 1/2 point in that game)? I think it should be a >>>combination of this: >>>1. white has an advanced white passer >>>2. the black king isnt able to protect the black pawn >>>3. the distance between the pawns is big >> >>This is probably too difficult because it heavily depends on the position of the >>bishop. If it would be on c3 then the position would be won for black >>[D]8/8/p6P/3K4/8/2b5/8/1k6 b - - dm 15; >> >>A possible rule would also be very complex because you need a special one for >>each a-h file of the opposite pawn. >> >>regards >>Rafael B. Andrist
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