Author: Steffen Jakob
Date: 06:41:04 12/28/01
Go up one level in this thread
On December 28, 2001 at 09:34:01, Thomas Mayer wrote:
>Hi Steffen,
>
>>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; 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
>
>hm well, I am not sure, but I think it can be described like that:
>
>That black bishop can't control a field before the white pawn to stop it from
>advancing and control it's own pawn at the same time... if that would be
>possible, black would win... because it's king could either get the white pawn
>without loosing it's own or it's own could promote... how about that one ?
You mean a position like this?
[D]8/p7/8/7P/2K5/4b3/8/1k6 b
This is a draw, too.
Greetings,
Steffen.
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