Author: Sune Fischer
Date: 01:24:21 09/02/02
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On September 01, 2002 at 19:12:01, Andrew Williams wrote: >Hi, > >On Friday I got back from a business trip and saw the discussion going on about >the effect of the opening book. Too tired to think of anything else to test, I >started a match between postmodernist with its big book (made up of Dann >Corbit's games collection) versus postmodernist without a book. To encourage a >bit of randomness, I told both versions to randomly vary the time they used for >searching the first few moves out of book. I have no position at all on the >debate that was going on, but here is some more data anyway: > >I played 200 games at 5 minutes + 2 seconds increment. Both sides played with no >pondering on the same Athlon 1200. There were no duplicates amongst the games >(according to Scid; I haven't checked by hand). > >The final score from the point of view of the version with the book was: > > +71 =78 -51 > >With a final score of Withbook 110 - 90 Nobook. As you and others have demostrated the (good) books have a positive effect on the score, but is it because the books leaves them in a superior position, or simply because of the time they save playing directly from book? I'd expect you might also see a score close to 110-90 if you give one program 5 min 2 sec inc and the other only 4 min 2 sec inc. It certain is a factor to be considered... -S. >Andrew > >PS Irrespective of the significance of the figures given here or elsewhere, I >won't participate in any tournament where an opening book is used without >explicit permission from its creator to use it in the tournament. PS No matter the effect of the book, it isn't the _engine_ playing....
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