Author: Christophe Theron
Date: 15:52:47 12/29/01
Go up one level in this thread
On December 29, 2001 at 04:14:41, Steffen Jakob wrote:
>Hi Christophe!
>
>On December 28, 2001 at 11:37:37, Christophe Theron 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; 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
>>>
>>>Greetings,
>>>Steffen.
>>
>>
>>
>>I'm sorry, but this is typically a problem that must be solved by search.
>>
>>If you start trying to write rules for this case and other cases like this one,
>>in a few months from now you lose your head.
>
>No knowledge is like wrong knowledge. E.g. here I apply my special code for
>KBPKP endgames which is wrong in this case. So I already have written a rule for
>this position. And the difference between V_MATE/2 and V_DRAW isnt a cosmetical
>issue. I dont think that I will lose my head. Actually fiddling with such
>positions is something which I like very much.
>
>Greetings,
>Steffen.
OK, good luck...
Christophe
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