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Subject: Re: Only the best two programs can recognize this position as a DRAW !

Author: James T. Walker

Date: 04:35:59 02/15/02

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On February 14, 2002 at 03:30:24, Dann Corbit wrote:

>On February 13, 2002 at 23:18:52, Jorge Pichard wrote:
>
>>On February 13, 2002 at 23:17:24, Jorge Pichard wrote:
>>
>>>Guess which are the only two programs to initially recognize this position on
>>>the very first minute of analyzis as a dead DRAW. Even if most humans at the
>>>first glanze can recognize this position as a draw, so far only two programs so
>>>far have recognized this simple position as a draw.
>>>
>>>[D] 8/2r3k1/5q2/2PP4/PK6/1PB5/8/8 b - - 0 1
>
>Did you use tablebase files?  It seems pretty obvious as qxB, Kxq, Rxp (king can
>'t save d pawn or rook cuts him off) so king scoots out of the way, Rxp, leaving
>KPPkr.  I would think tablebase files would help a lot.

Most programs with tablebases will see that after:
1. Qxc3 Kxc3
2. Rxc5+ Kb4

White can play 3. Kb4 abandoning the d pawn.  If Black takes the pawn it's a
tablebase draw.  So many programs will avoid taking the d pawn trying to still
win the game.  I have seen many programs lose trying to win drawn games.  Not
sure many would lose from this position but it's possible.
Jim



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