Author: José Carlos
Date: 03:25:00 09/02/02
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On September 02, 2002 at 04:24:21, Sune Fischer wrote: >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.... According to _your_ definition of engine. José C.
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