Author: Robert Hyatt
Date: 14:00:20 12/12/03
Go up one level in this thread
On December 12, 2003 at 15:10:04, Omid David Tabibi wrote: >On December 12, 2003 at 13:54:27, Robert Hyatt wrote: > >>On December 12, 2003 at 12:42:17, Omid David Tabibi wrote: >> >>>On December 12, 2003 at 11:24:26, Georg v. Zimmermann wrote: >>> >>>>Exactly, and thats why you should write your own book routine, instead of using >>>>part of a commercial package. >>> >>>I don't see any problems with this. By using the opening book feature of Fritz >>>or Shredder, you are merely avoiding a waste of time on something already >>>implemented. The big issue is hand tuning the created book, which makes the >>>difference between shredder.bok and falcon.bok :) >> >>You are overlooking the difficulty of choosing a book line also. There are >>lots of things to consider. How often it was played, how did the side on >>move do in the resulting games, how recent was the opening played or is it an >>old move that might have a refutation, etc. >> >>I've written book code. It takes a lot of time. Not to mention the >>learning facilities that you get for free with the Fritz GUI. Which is >>yet another important piece of code that you get to avoid writing. >> > >You can similarly argue that everyone should write his own endgame tablebases. >As it also takes a lot of time, and is much harder than opening book. > > No it isn't. And I have explained this reasoning before. EGTB probes themselves are deterministic. Everybody can use the same tables, everybody gets the same egtb.cpp probe code, everybody gets the identical same result when they call the probe code with the same position. So there is no "decision-making" inside there. How you _use_ those results can vary, but then that is outside the probes. A book is different. I've written lots of book code variations over the last few years, each was different, each was a lot of work, and each made real decisions about the game. Learning is an example of things done by commercial GUIS, and that should _not_ be shared code. > >> >>> >>> >>>> >>>>Georg >>>> >>>> >>>>> >>>>>I totally disagree with you about this. IMO opening book is one of the most >>>>>important parts of the program. Look at the games in Graz, many games were >>>>>already decided after the opening phase... >>>>> >>>>> >>>>> >>>>>> >>>>>>Uri
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