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

Author: Tord Romstad

Date: 09:47:52 02/16/05

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On February 15, 2005 at 11:11:45, Vincent Diepeveen wrote:

>On February 14, 2005 at 17:03:52, John Merlino wrote:
>
>>I don't think that Uri is saying that a good book is unimportant. There's a BIG
>>gap between saying that books aren't important and saying that they're worth 700
>>points. What Vincent is saying is that if a top engine was playing without its
>>well-tuned book it couldn't beat a master  -- and this is ludicrous.
>
>It is not.
>
>750 rating points is about rounded off the 100% chance.
>
>700 points means that if you join a world champs without a book you have 0%
>chance to win the title.
>
>Even a year or 6 ago, I remember Marty Hirsch + Necchi estimating having an
>average book versus good book already at 300 points difference.
>
>I'm speaking about no book versus very good book.

I have no time for programming at the moment, and I have plenty of CPU time
to waste the next few days.  In an attempt to test your hypothesis, I will
run a test match with the latest public version of my own engine
(Glaurung 0.2.1) against Hiarcs 9.6.  I have already played a match where
both engines used their opening books, and Hiarcs won by 75-25.  This gives
an estimated rating difference of 191 Elo points in Hiarcs' favor.

Tonight I will start a new match with Hiarcs playing without book.  If the book
is worth 700 points, Glaurung should win this second match by something like
95-5.

Tord



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