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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