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Subject: Re: Effect of books, round 1

Author: Uri Blass

Date: 06:47:58 08/26/02

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On August 26, 2002 at 09:38:52, Johan Hutting wrote:

>On August 26, 2002 at 08:15:36, Uri Blass wrote:
>
>>>I don't have a random .ctg handy here so I can't test it, but an old, buggy
>>>version of celes (rated 1800- or so) once scored 4/20 vs deep fritz in a 5 0
>>>match while both used deepfritz.ctg.
>>
>>it seems impossible to me to score so well against deep fritz.
>
>It was quite simple actually, Celes just had a plus when out of book, fritz
>decided to draw 8 times while that build of Celes didn't comprehend 3fold
>repetition yet. I admit the result is rather excessive, but it does point out
>the problem. Would you rather start with -1, -2 or worse out of book or with
>-0.5..0.5? Note that good books also give you solid positions with few
>positional weaknesses.

I understand now.
It is not going to be possible in more than 90% of the cases against movei even
with 1.e4 a6 because even in this worse position I do not expect repetition.

Even if celes does not know about repetition it is going to try to improve the
position and not to repeat.

Uri



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