Author: Andrew Dados
Date: 16:47:08 11/15/05
Go up one level in this thread
On November 15, 2005 at 18:01:09, chandler yergin wrote: >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! I may as well bite... :) He knows very well what is he talking about, and tried to explain that to you. You seem to assume for some reason every program uses chessbase *ctg format. There are several *hundred* chess programs and most of them use their own book format (like Bob gave you example of his crafty). Now when you use those engines in chessbase GUI (fritz or perhaps junior) those guis can be set to manage opening moves for 'non native' (UCI or winboard) engines - which means engine don't decide what move to choose but GUI does. And in that case indeed GUI does it from a *ctg book. However that means engine will not use its own book. Chessbase GUI will use its own *ctg book instead. So for example there will be no book learning. Chandler - get out of your chessbase corner or get a clue about many other programs. While chessbase can use them and even manage opening books for them it cripples them. Another thing is you mentioned getting few latest TWIC collections and making a book out of them. Such a book will be a disaster. Good book, tailored to programs play style and capabilities, takes months even years to hand-make. -Andrew-
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