Author: chandler yergin
Date: 15:01:09 11/15/05
Go up one level in this thread
On November 14, 2005 at 22:14:43, Uri Blass wrote: >On November 14, 2005 at 21:03:09, chandler yergin wrote: > >>On November 14, 2005 at 14:49:10, Günther Simon wrote: >> >>>On November 14, 2005 at 13:57:46, chandler yergin wrote: >>> >>>>On November 14, 2005 at 13:45:57, William Penn wrote: >>>> >>>>>I wonder if there's any way to see what it contains, such as by converting it to >>>>>a format that a GUI can read? My very superficial look so far agrees that it's a >>>>>good book, but I'd like to see and know all the details!? >>>>>WP >>>> The .ctg File can be copied to a .pgn File then sent as an E-Mail >>>>Attachment. >>> >>>I wonder what you are talking about? >>Quote above: >>"My very superficial look so far agrees that it's a >>good book, but I'd like to see and know all the details!?" >> >>He said he'd like to see it. I explained how he could, >>if someone wanted to send it to him. >> >> >>>The whole thread is about >>>Fruits native own book, which is of course no *.ctg file. >> >>Oh.. and how are Opening Books filed? Certainly not .pgn >>They are .ctg > >Fruit has its own format that is not .ctg or .pgn >Fruit's own format is based on pgn but it is not pgn by itself >and I think that you cannot translate it to pgn > >The book may include only positions and moves when position may be reached by >different games so you cannot get the games from the book. > >In some cases book even does not include exact positions but only hash key of >the positions and you cannot get position based on hash key but only hash key >based on position. > >hash key is a 64 bit number that is used to save space because book with the >full position may be larger. > >In theory it is possible that the program may think that it is in book when it >is not in book because the hash key is the same as the hash key of a book >position but practically the probability for it is so low that it may happen in >less than 1 of million games so the programmers do not care about that problem. > >Uri Well it's obvious you don't know what you are talking about!
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