Author: Moritz Berger
Date: 05:40:50 10/11/98
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Another approach for the "minimum book" approach discussed below is to build a book from a BIG database (if you have nothing better, just take the 300.000 games from the Fritz CD) with the setting "book depth: ECO + 0ply". This way, you get only positions classified in the ECO key (if you own ChessBase, copy bigeco.cod to the Fritz directory and rename it to eco.cod, this gives you a more extensive ECO key). Starting with "standard" theory (in a smaller book on your harddisk), you should consider doing "inclusive learning" by importing games as I suggested below. The Fritz book concept is really flexible and powerful for your own experiments, just open your mind and cook your own PowerBooks :-) Moritz On October 11, 1998 at 08:28:24, Moritz Berger wrote: >On October 11, 1998 at 07:12:58, blass uri wrote: > > >>>Finally, my educated guess (as promised ...): >>>Fritz 5 on P120 with 32 MB hash tables - about 2500 SSDF ELO >> >>This rating is based on learning. > >No, it isn't entirely based on learning. I played about a hundred games from >Dirk Frickenschmidt's "Play The Game" positions and some from positions of my >own choice, without any books at all. Plus a lot of Nunn-tests, but I don't know >if you will readily discount these results. Additionally, I played dozens of >games at faster time controls on chess.net and ICC. > >Finally trying to appease you, I should mention that I built a tree from about >1000 Anand games taken from CB Mega Database '98 and Fritz still scored >EXTREMELY well against all kind of opponents (yes, also right from the start of >each "match" :-)). Just try it yourself: Play an engine match with "Anand" book >for Fritz5 and "PowerBook" for Fritz5. "Anand" will not perform much worse... > >I think you're putting to much emphasis on books and learning. The Fritz 5 >engine itself is really strong and can compensate for almost every "book >deficit". Even using the old Fritz3 or Fritz4 .fbk books without any learning >(<200KB each) or converting books from Rebel, Genius or Chessmaster to Fritz >trees will produce decent results for Fritz. The tree offers more in terms of >education, statistics and learning, but if you're not willing to give it MBs on >your HD, that's also a reasonable choice. > > >Moritz > >P.S.: Since Fritz doesn't do "inclusive learning", i.e. it doesn't learn new >moves but just changes weights after each game, I recommend to "import" (not >merely learn) games into the book after you played against strong opponents at >significant time controls (i.e. at time controls where you will be using the >book in the future). This helps Fritz to build its own book, e.g. starting from >the aforementioned Anand (or Fischer or Kasparov or Capablanca...) repertoire. > >No, I didn't do this in my computer-computer matches. >Yes, I recommend doing this if you start with a very small book.
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