Author: José Carlos
Date: 07:37:06 05/29/01
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[snip] >I suspect that a very good and deep opening book will add 500 ELO [minimum] and >a very bad one will subtract at least as much or could even cause you to lose >every single game in the absurd cases. > >If someone wants to test my conjecture then by all means do so. The enormous >advantage of a good opening book is so obvious to me that I don't see it worth >the bother to test. Of course, if I am wrong, it is a titanic mistake. But I >doubt it. I support that the book is quite important for the engine strength. But +-500 ELO is crazy. Two programs identical in everything but the book can perform 1000 ELO difference! No way. The book (and book learning) is specially important if the opponent can 'cook' a book to play you. If not, suposing you play a big enough number of players, it can make a difference of 100-150 ELO at most. It is different if you play a match. Note that, in a match, a single bad line in the book can kill you if the opponent has learning and you don't. If both players have learning, or if both don't have, the impact of the book is much smaller, and you need a big difference in the quality of the books to make a difference in the results. José C.
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