Author: Dave Gomboc
Date: 12:59:40 03/30/00
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On March 30, 2000 at 02:32:46, blass uri wrote: >On March 29, 2000 at 23:42:32, Lawrence S. Tamarkin wrote: > >>I think you have over-simplified your opinion about the different opening books >>that go into making the books for the programs. I think a lot of thought goes >>into making the best available book, especially for a program like Fritz6 or >>Junior6 which has large books, (over 120 mbs), and also has 'Tournament use' >>turned off at default, because the program is designed to aim for positons from >>the book that favour its best play. Also, I specifically bought Junior6, >>because the opening book was prepared by GM Boris Alterman. > >I also thought that GM will do a better book and I see that I was wrong because >when I look at Junior's games I see that Junior does not get a better position >in most of the games against computers. > >I suspect that alterman did not work seriously for improving Junior's book and >the only reason that they gave a GM to work for Junior's book is not to improve >Junior's book but to tell customers that the book was prepared by a GM. > >It also seems that the book is based on games and there is no case when Junior >plays a move that was not played in more than one game if you optimize book for >playing and I think that it is a mistake. > >I read that in one of the games of Junior against zarkov one of the moves(Qxb2) >was marked by ? but Junior did not find a move that was played in more than one >game so it had to calculate and finally played the bad move Qxb2. > >I do not understand it because if alterman analyzed the relevant position and >found that Qxb2 is bad then Junior should play the move that alterman believes >that is best without caring about number of games. > >Uri Deep Junior seems to have a parameter to set this with, Uri. You can tell it to ignore the prepared book when a line has been played too infrequently, but the cutoff for how many times is infrequent is adjustable. Dave
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