Author: Jason Williamson
Date: 12:30:34 12/04/00
Go up one level in this thread
On December 03, 2000 at 14:55:01, John Merlino wrote: >On December 03, 2000 at 11:23:19, David Dahlem wrote: > >> >>On December 02, 2000 at 21:09:58, John Merlino wrote: >> >>>On December 02, 2000 at 18:23:02, David Dahlem wrote: >>> >>>>I have been trying to create an opening book by importing a pgn file. Every >>>>attempt has resulted in this message - "import error: an error occurred >>>>importing the pgn file". Has anyone else tried to import pgn files into an >>>>opening book in CM8000? Does the pgn file have to be free of commentary and/or >>>>variations? >>>> >>>>Dave >>> >>>If you think the PGN file is completely free of errors, then E-mail me the file >>>and I'll pass it on to the development team. Does the error message give you any >>>indication of WHERE in the file the error occurred, or WHAT the error is? >>> >>>jm >> >>I decided to try a little test. I thought maybe the problem was with the size of >>the pgn file so i created some with only 100 games. These were imported without >>an error message. Then i tried a pgn file with 500 games and got the error >>message. So it appears the problem with CM8000 importing pgn files into the >>opening book is with file size. Unless someone wanted to take a large amount of >>time splitting a large pgn file into very small ones, the import pgn into CM8000 >>opening book is worthless, unless this is addressed in the patch. >> >>Dave > >It is possible that the number of games is the problem, but I know for a fact >that I have used it to import PGN files with more than 3,000 games. However, the >one factor is HOW MANY DIFFERENT OPENINGS are in the PGN file. The more >disparate the openings, the bigger the opening book will be, and the opening >book format can only handle a certain number of moves. Since the default depth >is either 30 or 40 plies (can't remember), this could cause a problem. In other >words, you can import more games if the games all use the same family of >openings. > >I do know that the patch is going to address this SOMEWHAT by giving the user >many importing options, such as the depth of the book, what criteria to set the >frequency of the moves, etc. Hopefully, this will "solve" the problem. > >jm Oh, are you telling me that the opening book creator is limited in the number of lines that it can use? Thats pretty sad. I wanted to create a massive opening book from my large pgn. Yace uses an opening book that is built from a 600 meg PGN file. Crafty uses an opening book built from a 1.2 GIG pgn. In both those cases though they use extensive pruning of the moves out, and do not store the whole game of course. JW
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