Author: Arturo Ochoa
Date: 04:53:58 08/27/02
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On August 27, 2002 at 05:31:44, Mogens Larsen wrote: >On August 26, 2002 at 17:37:56, Arturo Ochoa wrote: > >>Hello: >> >>No, it is not better and it doesn't have any sense. As you declared in the long >>thread below, you believe (but it is not demonstrated) that a engine with book >>is not better than a engine without it. > >The problem with matching two identical engines with and without book is the >deterministic nature of the games due to identical evaluation. Some would call >that an advantage, ie. a more truthful picture of the situation after the book. >However, that doesn't simulate actual matchplay conditions. The ponder >percentages are lower (if played with ponder) and the hashtables less likely to >be filled with "correct" information. The other problem is identical or very >similar games. Here learning won't usually help the bookless engine. > >Furthermore, it doesn't follow that the book advantage is tranferable to matches >against other engines. My conjecture is that if you use the same book (eg. same >PGN collection) in matchups between different sets of identical engines, some >will display a difference and some none at all. Maybe even do worse. I also >suspect that the ELO difference will decrease with extra time on the clock. I have a single question to this interesting analysis: Why three different engines and now Yace are establising a remarkable difference in this kind of Matches? I would like to know: The Match Yace is not 12-6 for Yace with Book against Yace without Book. Is this not remarkable? In other engines matches of the Top, the difference was 12-8, 13-7. Is this not remarkable? >Here I agree with Uri's >suggestion. Some kind of gauntlet seems better if you want to test the case no >book vs. book. > The problem is real: The premise established by him was: A engine can solve the majority of the opening problems and an engine with book is not better that the same engine without book. Tell me, a gaunlet can solve this? How? Ok, let´s do it by this way. If it is waste of time to show that real statistics are not valuable, then I won´t continue matches of this kind. Best, Arturo. Post Data: My compliments for Dieter, Yace has impressed me. :))
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