Author: Moritz Berger
Date: 08:42:35 02/23/98
Here is more information about the configuration which got Fritz to the top of the SSDF list. Doesn't sound like a killer book (quite the contrary, an book created from a huge GM database, almost without any fine-tuning for Fritz), the only significant thing is the hash table size (44 MB, which is not really that much nowadays ...) and the choice of opponents - playing many weak opponents (like Fritz 4 did because they couldn't use the autoplayer with it) is too risky on "THE LIST", because even the occasional draw that is forced out of book will cost too many rating points. Since the SSDF now has an autoplayer, Fritz will be matched mostly against Auto232 compatible opponents and therefore not be endangered to lose too many rating points against non-Auto232 opponents (Sparc 20, Chessmaster 5000, ...). (quote from www.chessbase.com/news.htm) Fritz5 on SSDF list Fritz5 has been included into the latest SSDF list with the highest rating a chess program ever achieved. 1 Fritz 5.0 Pentium MMX 200 MHz 2589 54 -50 198 67% 2463 2 Nimzo '98 Pentium MMX 200 MHz 2534 43 -40 297 63% 2436 3 Hiarcs 6.0 Pentium MMX 200 MHz 2533 36 -34 414 63% 2441 Fritz5 setup for SSDF games: 44MB hash tables (on 64MB machines), openings book writeable on hard disk, CD with endgame database in CD drive, chatter sound and music off, book learning parameters = default. Fritz5 unfortunately scored around 40 points weaker in the SSDF result than in our own published tests (Nunn-matches). Possible reasons: We used 100 MB hash tables. The 44MB possible on a 64MB machine get filled in less than a minute on a P200MMX. The Nunn-match excludes opening book preparation effects. In contrast to the books of other programs neither the Fritz5 standard book nor the PowerBook CD is in any way engine-dedicated: There isn't a single move in the book which hasn't been played before between two human players in a published game. Statistical probability of Fritz' opening choice is determined by popularity and score of opening variations in human chess.
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