Author: Steffen Jakob
Date: 06:24:27 12/28/01
Go up one level in this thread
On December 28, 2001 at 09:17:00, Mark Young 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
>Would it not be better for Hossa to use EGTB for this type position? Then Hossa
>will solve this position without error.
Yes it would solve this position, but
1. I want my engine to be able to play this correctly even if the user (so far
only me) doesnt have all 5 men tables installed.
2. I dont probe tablebases in qsearch
3. This is a pattern which might occur in positions with more than 5 men like
this:
[D] 8/8/p4b1P/3K4/8/8/7P/1k6 b
Greetings,
Steffen.
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