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Subject: Re: a couple questions about crafty and tablebases

Author: Robert Hyatt

Date: 17:25:26 10/11/99

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On October 11, 1999 at 19:37:12, Paul Svelmoe wrote:

>Hi,
>  I've heard some of the talk about how hard it would be to generate 6 man
>tablebases such as the one that's in demand now (kqpkqp).  Is there any way it
>could be done within a week or 2, modifying the generator, etc., if the white
>pawn was at g7 and the black pawn at d4, thereby eliminating all other pawn
>position possibilities?  Also, I might add, it would be acceptable to disallow
>underpromotion.  Also, I might add, we could probably get 20 or 30 programmers
>working on the task 2 or 3 hours a day for modifying the generator. (Would it
>really be that difficult??).  Also, I might add, one of us probably has access
>to 64 bit hardware.
>  As for crafty, how does one go about modifying wcrafty?  When you download it,
>all you get is the executable with no source code as in regular crafty.  If it's
>not possible, what command-line options would be best to optimize it for the
>position white: Kh6, Pg6, Qd4 and black: Kb2, Pd5, Qf5?
>Many thanks,
>Paul

1.  wcrafty is a mis-name.  It was done as we used to also do 'crafty'
executables which were dos-files.  starting with version 17.0, we will only
have 'crafty.exe' type files, without the w.  The source files are the same for
_all_ systems...

2.  crafty doesn't build the databases, that is Eugene's code.  Crafty wouldn't
need any modifications to use the 6 man files you are suggesting, assuming that
someone has the time to modify the generator...

However, modifying that code is non-trivial without a lot of 'reading'.



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