Author: Sune Fischer
Date: 01:42:26 11/28/02
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On November 28, 2002 at 04:36:59, David Rasmussen wrote: >On November 28, 2002 at 04:23:15, Sune Fischer wrote: > >>My present book format is really simple, too simple. >> >>I would like to use transpositions and book learning, so I need a new format. >> >>Is there a "standard" way of doing this, some well known technique which >>includes statistics for each line and makes it possible to transpose back into >>the book? >> >>I can only think of primitive ideas, like storing the full FEN and append each >>possible move reply to it. That will of course blow the book to a huge file. I >>guess some other hashing scheme can be done, but what is the _best_ way? :) >> > >If you use zobrist hash keys (which you already have, if you have traditional >hashing), transpositions are dealt with automatically. There are other issues to >deal with, but hash keys will get you started. True, but my gut feeling is that storing 8 bytes per position (plus their moves) still makes quite a large book? I guess 6-7 bytes will be enough though. -S. >/David
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