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Subject: Re: Question for Marc B regarding R+P vs. R+P

Author: Marc Bourzutschky

Date: 14:21:14 05/22/04

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On May 22, 2004 at 14:32:24, Ed Trice wrote:

>Marc,
>
>You mentioned your 6-man Rook + Pawn vs. same database used some other
>convention, which format was it? Is there an endgame format conversion utility
>out there capable of transforming this into the familiar Namilov format to allow
>it to be probed in RAM during runtime?
>

It is in Johan de Koning's FEG format:

http://chessmaster.ubi.com/Download_EndgameDatabaseGenerator.htm

it is a proprietary format and there are no conversion utilities, so the data
can only be probed by Chessmaster.

>Do you know of any projects seeking to solve a practical subset of some
>databases, such as Rook + h + f pawns vs. sole Rook?
>
>Any response would be greatly appreciated!
>

The complete krppkr database in Nalimov format is available for download from
Bob Hyatt's ftp site.  With Rafael Andrists "Wilhelm" program you can analyze
particular subsets, such as krp(f)p(h)kr, reasonably well.  krppkr is also
available on a DVD from Chessbase, but some of the positions are corrupted.

As far as solving practical subsets of tablebases, it is a bit redundant now
that 6-man endings are basically done.  Peter Karrer and more recently Dieter
Buerssner have been working on algorithms that allow tablebases analysis with
particular pawn configurations.  I'm not aware of any publically available
programs, however.

-Marc



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