Author: Bob Durrett
Date: 13:26:09 11/19/00
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On November 19, 2000 at 14:47:29, Uri Blass wrote: >On November 19, 2000 at 14:27:11, Jorge Pichard wrote: > >>Rebel will win against V/D Wiel just like in the past, due to months of openings >>preparation. >> >>http://www.icdchess.com/forums/1/message.shtml?139875 >> >>Pichard. > >Monthes of opening preperation are not going to help Rebel when it finds itself >after 2 moves out of book. > >This is exactly what happened to my rebel when I played against a GM in >correspondence games. > >The game began 1.g3 d5 2.f4 and Rebel is out of book and the same for the tiger. >old Fritz5 book have move in book in this position. > What this really shows is that the opening book used in your copy of Rebel was not very complete. To be fair, there must be considerations which force the programmer to chose the size of the opening book. But a book which does not include moves played often by GMs in the recent past is seriously incomplete. Lines which have been played only once might be excluded whereas lines which occur often in GM practice be included. [But critical lines played only once should be included.] The basis would be to increase the probability of the book line actually being played. All very reasonable. But unnecessarily incomplete books seem odd since the book data does not have to be stored in RAM. With really huge hard drives being commonplace now, a large book could easily be put on the hard drive, or even kept on a CD. The cost of producing [or purchasing] a large book might be the reason why your copy of Rebel had such an incomplete book. >I do not think that opening preperation helped Rebel in the past against humans. >I think that jeroen's book is too small and if he does not do opening prepration >then Rebel will be at disadvantage relative to other programs with bigger book >and may be a victim of opening preperation. > >Uri
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