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Subject: Re: Testposition - Rookending

Author: Enrique Irazoqui

Date: 15:37:45 02/25/01

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On February 25, 2001 at 13:46:32, Sune Larsson wrote:

>
>  [D]8/5p1k/r5pp/P7/3R3P/6P1/5PK1/8 w - - 0 1
>
>
>  1927 Alekhine won the 34th game in the battle vs Capablanca to become
>  World Champion. He did it by playing 1.Ra4! in the above position.
>  Black's rook has to block the pawn and white has at his disposal an
>  endless reserve of rook moves along the a-file. Again, the future for
>  black spells "Zugzwang". The general rule is that a passed pawn should
>  be supported by a rook from the rear. That's why ideas of 1.Rd5? are
>  wrong. This is a knowledge that have to be implemented in many chessprograms.
>  I have seen numerous examples of trying to support such a pawn sideways.
>
>  What would your favourite program play?
>
>  Sune

Deep Shredder 5 beta plays Rd5, +2.21, ply 19.

Also Junior 7 beta plays Rd5, +0.93, ply 23.

Enrique



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