Author: Rafael Andrist
Date: 12:27:43 12/28/01
Go up one level in this thread
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?
> 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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