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Subject: Re: How much stronger is YACE 0.21 with the Nalimov Table Bases ?

Author: Dann Corbit

Date: 12:37:22 07/23/00

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On July 23, 2000 at 10:41:06, Jorge Pichard wrote:

>I just Installed YACE 0.21 but decided not to include the Nalimov Table Bases.
>Can somebody give me a good estimate of how stronger will YACE play with the
>Nalimov?

Look at the tablebase hits for a series of games.  Each tablebase hit (not just
probe) returns perfect knowlege.  And if you have (for instance) 5 pieces left
on the board, then tablebase files will cause perfect play if you have all of
hte 5 piece files.

On the other hand, they will make no difference at all, in the early game.
Actually, they might make it play a tiny bit worse, because memory that could
have been used for hashing is now used for cacheing the tablebase files.

Overall, it seems that they don't add a huge amount of strength to programs in
general.  But if you make it to the deep endgame phase (fairly rare) it will
have a very large impact there.

Opening books are far more important than endgame tablebase files.  If you can
create a huge opening book without defect it will add a tremendous strength
boost to your program.

I't's the 'huge' and 'without defect' that are a problem.  But I did say "if..."
;-)



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