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Subject: Re: Endgame position

Author: Howard Exner

Date: 04:05:53 05/12/98

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On May 12, 1998 at 01:17:08, Kai Skibbe wrote:

>The following position is from a game between
>Rebel 9.0 28 MB HT and Fritz 5.03 64MB HT on
>a PC with a AMD K6-200.
>
>WKh3, Rh6, Pg3,g2
>BKc5, Rb6, Ph7
>White to move
>
>Rebel 9.0 as white was unable to find the winning
>exchange Rxb6 in 5 minutes. He played Rxh7 and after
>some moves the game became a draw.
>I have tested the same position with Shredder 2.0 64MB
>and Genius 5.0 32 MB. Both programs didn´t see the winning
>exchange in 10 minutes and played the same move as
>Rebel (Rxh7).
>I´m not sure if the game could be a win for white after
>Rxh7, but after Rxb6 the win should be clear.
>
>Does any chessprogram play the move Rxb6 and see the win ?
>The evaluation should be at least 4 pawn, if the program
>has understood the position.
>
>Why is this position so difficult for programs ?

Both moves, Rxb6 and Rxh7 will win. In the Rxh7 line the
black king is too far away and will be cut off by white's
Rook (Rd7).

Could you post the remainder of the game ? I'd like to see
how Fritz managed to draw this. I've seen Rebel routinely
win these kinds of positions when the king is cut off.




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