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Subject: Re: Question re general effect on results of using tablebases

Author: Robert Hyatt

Date: 10:51:20 12/05/00

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On December 05, 2000 at 12:34:35, Christopher A. Morgan wrote:

>I assume Bob Hyatt's Crafty play on the various chess playing sites
>makes use of the Namilov tablebases for 3-6 pieces as posted
>on his site.

As a note, I don't use the 6-man files.  They are big, and with no pawn
files (yet) I haven't gotten around to using them.  It is certainly doable
with good 70+ gig SCSI drives being reasonably priced.

> I was wondering what the effect of using
>such tablebases is on the overall results of games against
>good human players vs not using the tablebases.  Similarly
>against computers with and without use of the same tablebases -
>all other variables maintained.
>
>Intuitively, it seems use of tablebases should raise program's
>ELO by some not insubstantial amount - 75-100 ELO points, more?

I think against computers, EGTBs are significant.  Against humans, they
aren't so significant, since most human games do not make it into the
endgame stage very often.


>
>Anyone know whether Deeper Blue had tablebases of some kind?
>

yes... It had the Thompson ones for sure.  WHich was not complete by any
means, but useful anyway.




>Thanks.
>
>Chris



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