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Subject: Re: The case of the rook vs rook with bishop- and rook-pawns endgame

Author: Marc Bourzutschky

Date: 13:14:26 06/20/03

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On June 20, 2003 at 13:34:28, Matthew Barnett wrote:

>In Alburt and Krogius' 'Just the Facts', they say 'the weaker side often reaches
>a draw' in R vs R with a and c or f and h pawns endgame, given a couple of
>techniques.  This is what I've been taught and believe(d), too.
>

Endgame databases confirm the theoretical advice for the most part.

>I'm trying to look into this further and find out what 'often' means in terms of
>the percentage chances of winning/drawing/losing the game with this material
>with CB8.
>
>Short of trawling through over 3000 games that a 'material' search has thrown
>up, which includes non- a and c or f and h pawn games, is there any other way of
>finding this out, or narrowing things down further, with CB8?
>

You can narrow the CB8 search with the "position" feature to only select a-c or
f-h pawns.  Even simpler, if you let CB8 compute the large endgame key this
particular ending gets its own key so that you can collect these particular
endings with a single mouse klick.  Keep in mind, though, that the ending is
often misplayed in practice, usually with the defenders losing drawn positions.

>Can anyone recommend any further reading or sites that may be of interest with
>regard to this endgame?
>

"Fundamental Chess Endings" by K. Mueller et al., and "Batsford Chess Endings"
by J. Speelman et al. contain decent discussions of this particular ending, in
addition to being very good and relatively error free references for endings in
general.

>Many thanks for any help.
>
>Matthew



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