Author: Ricardo Gibert
Date: 14:39:06 12/28/01
Go up one level in this thread
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.
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
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.