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Subject: Re: Zappa endgame bug

Author: Uri Blass

Date: 21:54:56 08/23/05

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On August 23, 2005 at 22:20:24, Daniel Mehrmannn wrote:

>Hello,
>
>in a blitz game vs Homer, Zappa gives all pieces and thought it has won:
>
>[D]8/2p2kp1/1p2p3/2p1p1PP/2P1P3/1r2BK2/4R3/3n4 b - -
>
>Zappa as black played here directly 51...Rxe3+ with +4.57, but its draw !

I do not think that it is a bug.

engines are not perfect and this is what happens when programmers try to
implement human knowledge.

I am sure that a lot of humans will play the same blunder at blitz time control.

Humans know that pawn endgame with 1 pawns advantage are in most cases won for
the side with the advantage so they can easily imagine that 2 pawns advantage
has to be a simple win and finding that the idea that c6 and b5 to create passed
pawn does not work because white does not have to capture b5 may be too much for
them in blitz game.

Uri



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