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Subject: Re: Building tablebases

Author: Jeremiah Penery

Date: 22:07:29 09/01/02

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On September 01, 2002 at 21:22:04, David Terry wrote:

>I was wondering if anyone had the answers to the following two questions:
>
>1) I'm using the tbgen program that comes with fritz 7.  I was comparing the
>size of the files on ftp://ftp.cis.uab.edu/pub/hyatt/TB/ and the sizes differ
>from the ones I've built.  For example I have a kbbk.tbs file that is listed as
>1.35 KB while the one on the ftp size is 1.31 KB.  The .emd files seem to be
>coming out the same size.  Might this cause me problems in the future?

I think the .emd files are the only ones that matter.  Make sure they're the
same number of bytes as those on the FTP machine.  The .tbs files are just text,
with information about the positions contained in that tablebase.

>2)By using the tbgen program I'm unable to build any endgames with six pieces.
>While I don't feel my computer could handle building these in the first place
>I'm curious as to how someone might build these tables?

They require a different generator, because you need to use more bits/position
to store them.  I think all the ones that have been built were done on 64-bit
Alpha machines or something, with tons of memory.  It would take FOREVER to
build some of them on a normal PC, though you may be able to do some.



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