Author: Sandro Necchi
Date: 23:20:33 01/31/01
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On January 31, 2001 at 10:02:25, Uri Blass wrote: >On January 31, 2001 at 08:35:34, Sandro Necchi wrote: > >>On January 31, 2001 at 01:00:18, Jouni Uski wrote: >> >>>http://www.computerschach.de/tourn/cad2001/cad2001.htm >>> >>>In Gadeques tournament Deep Fritz - Shredder 5 ended 10-10. But 14 games were >>>won by white! And I thought, that whites advantage is minimal in computer chess. >>>Have programs killer books or what? >> >>As far as Shredder 5.0 is concerned there are no killer variations. The book is >>made mainly for the human players and with a lot of alternatives to make it play >>different lines. There are very few very long variations. Of course there are >>good move against weak ones, but not deep variations. >>So, it is a sort of compromise to make the program fun to play with. >>Since we drew 6 games and lost 7, there is still a a lot of room for >>improvements... > >I remember the claim that Shredder is 100 elo better than Fritz6a when one of >the reason is better opening book that is optimized for long time control games. No, maybe I did not clearly explain what I meant. I said that a friend of mine, testing the program regardless of the opening book, said that it was 100 points better than Fritz 6a. So it was not the book making it stronger, but the engine being stronger. Of course the book can help in many games... > >What happened to this claim(remember that the time control of Enrique is >similiar to the ssdf games when you consider the fact that Enrique's hardwrae is >faster)? > >I think that you should tell the customers some monthes ago that you did a >compromise in order to make the program fun to play with. I already did, because the book is made "to make happy" as many users as possible. The best book, from a performance point of view, would be a book with limited variaty, but most people don't like this, so I had to make it with a great variety and that means playing also weaker lines. > >I believe that a lot of customers do not use chess programs to play against them >so making the program fun to play with is simply irrelevant for them because >they prefer an opening book that help the program to win more games. Well, some yes other not. Anyway the book is made to be able to face any opponent, but again I had to make a sort of compromise. Well, looking the scores it doing well anyway. Now I am working on my new book. The opening book is being improved nearly every day! > >Uri Ciao Sandro
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