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Subject: The importance of tablebases with programs.. freeware vs commercial

Author: Kevin Strickland

Date: 15:22:46 06/06/02


I have been running engine matches, as well as an account on ICC with different
engines and have noticed somethings.

1. Crafty greatly improves in the endgame with the tablebases in use. It plays
fine without them but does incredibly better with them. This goes for almost all
freeware/shareware programs.

2. The commercial programs I have tested are Fritz, Junior, Shredder, Chess
Tiger, Gambit Tiger. With these programs they do extremely well without the
tablebases. In fact I have seen that the two Tigers play with almost no
difference at all. The commercial programs just seem to "know" the endings I
have seen. The Tigers are definately proof of this.

3. The only commercial program that seems to "need" the tablebases is Nimzo. For
whatever reason it just plays endgames horribly without them.

4. Of the commercial programs that _don't_ use the tablebases it is a saw off of
which is better. Goliath Blitz and Rebel seem to play endgames very well without
them. The winboard Goliath Blitz does not do well, but in the Chess Academy
interface it does very well. I have it outscoring Fritz 7 23-17 thus far in 40/2
matches.

5. The program that benefits the most out of all the engines that I tested is
without question Yace. The difference in play with/out them is great. I am
surprised by this.

In short why is it that the commercial programs with the exception of Nimzo do
not seem to greatly improve with tablebases? Fritz 5.32 is a monster is does not
use them yet is just as good as most commercial counter-parts. Yet the freeware
programs increase greatly in strength with using them.

Does a commercial program contain more knowledge in the endgame due to lack of
way to improve the opening/middlegame so the authors concentrate on the endgame
due to the amount of knowledge there is to put in there?

This is just my findings and I am sure that others will disagree, but I think my
two cents count as well.

Kevin.




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