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Subject: Re: 15th Game

Author: Peter Berger

Date: 06:59:21 12/29/03

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On December 28, 2003 at 22:47:38, Robert Hyatt wrote:

>Let's try the math again.
>
>It beat rebel 12 handily at 8-1.  It barely beat junior at 10:1.  It beat
>shredder 6-4 at 8:1.  Hiarcs is "in progress".  If you slow crafty down by
>1/2, it would _not_ get "crushed".  We can easily test that hypothesis however.
>A factor of two does not go from "winning" to "getting crushed".
>
>The "circumstances" were not exactly in Crafty's favor either.  I don't use
>that wide ICC book for tournaments.  I don't play those opentings for
>tournaments.  The commercial programs come with a very good default book, that
>has been hand-customized by a professional book writer.  My book is just a
>collection of games combined into a big book.  The matches were played with
>book learning off, which further hurts a pretty randomly-created book more than
>it does a hand-crafted book.
>

When it is about the match against Junior, Crafty played with book learning
activated.

I posted an analysis about the book battle in this match about a week ago - in
the match Junior-Crafty there was no book advantage for Junior at all, to the
contrary in fact. An extemely short summary: Junior never reached any advantage
with the white pieces and though the black side was not bad at all, it had to
suffer from 1.5 book losses too. I don't believe Junior's book is so great at
all.

As posted before Crafty should have played a wider repertoire and try to get its
opponent out of book earlier in general IMHO - but with your tournament book you
would probably do the opposite, narrow it down even further. I don't think this
would be to Crafty's advantage, but I probably won't find the time to do a test
during the next months.

Peter



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