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Subject: Re: Fritz 7 test: Shredder 5.32

Author: Peter Berger

Date: 09:32:07 11/29/01

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On November 28, 2001 at 02:17:41, Sandro Necchi wrote:

>This is the best I could do for the time being.
>The main target was to make a program (engine + book) which is really fun to
>play for humans, not to score better against other chess programs.

I understand and agree. Strength is but only one of the reason a good
chessprogram should have a good opening book,too - and I think it isn't the most
important one by far.

>
>However, making it better it does score better against other chess programs.
>Over 100 points was the last picture against other chess programs (120 to be
>precise; last score Shredder 6 - Deep Fritz  1h games - 38.5 - 23.5 +32 =13
>-17), but I normally think it is better to use lower figures, so I say probably
>80 points in total.
>

I am not sure if you knew that I was very serious and didn't joke at all.

We can observe two main effects:

a.) The books prepared by the "professional" book cooks spank the default GM
books ( I think there might be even 100 points to be earned here if done by the
very best).

b.) If the engine has some opening knowledge of its own and a learner even the
best book won't score more than 50 points more than the same program with no
book IMHO ( not even remotely enough data to prove though).

So it is maybe even easier to weaken your program by adding an opening book in
comp-comp games IMHO.

I think the best "professional" book cooks are able to gain 50 points and I
think that's nothing to be sneezed at.

I have tried some book fooling around myself ( just for fun ) and think it's a
non-trivial task to improve in a decent way even upon a default GM book for
comp-comp games unless you are extremely careful ( only few very obvious
changes). And if you look at the games from previous CC championships ( I
recently downloaded a big file by Frank Quisinsky and had a look ) it is amazing
just how many games were lost by opening blunders out of book the engine
probably would never have played itself.

Regards,
pete



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