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Subject: Re: Benefit of tablebases seems to be 2 points!?

Author: Ed Schröder

Date: 00:44:30 10/15/99

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>Posted by Marcus Kaestner on October 14, 1999 at 04:01:40:
>
>in chessbits 3 i´ve made a test with the nunn-endgames (10 endgame-positions
>played with both sides). every program one time with, one time without tb´s
>
>after abaout 140 games
>h7.32 earned +5 elo for the tb-version
>n7.32 earned +12 elo
>
>far the best was crafty 16.13 with +65 elo, topping even the score of hiarcs
>7.32tb
>
>marcus

Take this into account: Some programs may have so much chess knowledge in their
programs that (the current) TB's have zero effect in the end. This will change
as soon as the 6-man TB's (and up) will come, no doubt..

Other programs are developed to 100% rely on TB's and therefore have very few
(or nothing) chess knowledge inside because there is no need for that. I don't
know in to what extend this is true for Crafty but I am confident Bob will
tell you.

As a result you can not compare the value (elo gain) of TB's in this way as
it will depend of what is already inside a program (or not).

Rebel knows the most important ones such as (by head):

- KRK
- KNNK
- KBNK
- KPK
- KRPKR
- KNPKN
- KBPKB
- KQPKQ

I am sure this list is not complete. Of course the bad-bishop situation is
covered too. Some others are not covered such as KQKR (Hi Jim!) for which
Rebel will rely on TB's in the future.

Ed





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