Author: Ricardo Gibert
Date: 14:41:18 12/28/01
Go up one level in this thread
On December 28, 2001 at 17:39:06, 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?
>
>Could you post your progs analysis. 1...Kb2 2.Kc5 Bc3 3.h7 a5 4.Kb5 Kb3 5.h8Q
>Bxh8 6.Kxa5 is 11 ply.
10 ply. It's not my day today. I hereby ban myself from making any more posts
today :-(
>
>BTW, this was what I originally wanted to post before, but I decided to double
>check my brains analysis with the computer at the last moment and made the cut
>and paste error. I misled myself for a while there into thinking my original
>analysis above was in error :-))
>
>>
>>> 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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