Author: John Merlino
Date: 14:25:18 12/03/00
Go up one level in this thread
On December 03, 2000 at 16:04:45, David Dahlem wrote: > >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. >> >>jm > >Not exactly sure what you mean by "same family of openings" but unless a book >covers all openings, wouldn't it have "holes" in it? > >Dave You are correct. The problem, I imagine, is that the opening book importer pretty much goes 30 (or 40) plies deep for ALL lines that are found, even if a line is found only once. This adds up very quickly. When I say "same family of openings", I mean Sicilian, Queen's Gambit Declined, etc. However, you should probably e-mail me the file (the one with 500 games) that you are having problems with, so the development team can have a look at it. There could very well be a bug, and having data that can reproduce it is vital. jm
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