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Subject: Re: Most brilliant novelty from cct7 Witchess-Arasan

Author: Peter Berger

Date: 16:18:58 02/14/05

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On February 14, 2005 at 18:57:07, Arturo Ochoa wrote:

>Well, if you think that Uri´s posting are not ludicrous, we are alll entering in
>the absurd world of Uri. That is. It is a waste of time to repeat again and
>again in this Forum, that a book tuned for a specific engine is a bid advantage
>against other program or a GM.

I am afraid that the absurd world of Uri is the one I am living in too.

There are three kinds of opening books:

a.) no book
b.) random book
c.) optimized book

b.) should be the worst selection here for a strong engine, worse than a.), but
it might be hard to prove, and it will not apply to all lines.

c.) will outscore b.) much worse of course IMHO. That's the best choice against
the worst.

Trouble (or art?) is to determine how to do c.) . In the past this was hard,
hard work, requiring much patience , thousands of moves to be entered in the
book, but maybe this kind of opening book has some disadvantages by now. For me
this seems to be Uri's major point, and I think it is a valid one.

To improve on the engine's own choice it is not enough to just enter moves into
opening books or to do some blundercheck. Think of the Kramnik-Leko Marshall
game - this could have been played at a computerchess event too.

The interesting challenge would be to run a highly optimized opening book
against one generated from a random source with maybe 20-50 changes altogether -
is it really clear who would win this challenge ?

There might be two or three book authors (the famous guys) who go beyond, have
gotten rid of all automated lines (important!) and are competing with the
grandmasters themselves with the help of the engines now. But from what I can
see nearly all still start from some automated base, and this has become a major
reliability by now.

It's a bit late - hope the general idea still transports.

Peter



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