Author: Moritz Berger
Date: 08:46:12 09/12/98
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On September 12, 1998 at 11:01:36, blass uri wrote: >I suspect that you use the same book that they used in paris >It is a bad book. Powerbook + Blitz learning against Genius is unlikely to work against any kind of opponent at tournament time controls. Reason: Fritz won too many games with weak lines, increasing confidence in playing them. It got punished for these weak (learned) lines (which were good enough against Genius at blitz) by other programs at tournament time controls. Same effect if I play 100 crap games against Fritz with learning enabled: Next time it will try the Orang Utan opening against an opponent (computer program) of my choice and is more likely to lose, because my weak play increased its confidence in those opening lines. Easy to see how to cripple the opening book this way when applying learning regardless of opponent's strength. Only way out: Reset book weightings before each match and (optional) do book learning from a database of Fritz games at the same time control against "known" strong opponents. >I am sure that they understood it after paris and I do not believe that they >used this powerbook for the ssdf list. >Do you use the same powerbook that they sell now? > >Uri The commercial powerbook scored significantly better than the standard Fritz 5 book at the SSDF. It was something like about 40 ELO stronger, AFAIR, you can look it up probably on the SSDF homepage somewhere ... Moritz
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