Author: Uri Blass
Date: 04:52:19 01/14/04
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On January 14, 2004 at 07:08:50, Tord Romstad wrote: >The day before I released Gothmog 0.4.5, I played a blitz match (4 minutes/game, >with 1 second increment) between my engine and Phalanx XXII on my PowerBook >G4 550 MHz. Gothmog narrowly won the match; the final score was 52.5-47.5. > >Yesterday, I started a new match between the same two engines. The only >difference was that this match was played on a PIV 2.4 GHz, and that learning >was disabled for Phalanx in the second match (my own engine doesn't learn). >The result: 65-35 for Gothmog. > >Is this just a statistical fluctuation, or is learning really that effective? >Or perhaps Phalanx (a very old engine) simply doesn't play well on fast >hardware? > >Tord I think that learning can be very effective. An engine that does not learn may lose the same games again and again after enough games. I use learning for matches of 4 games that are popular in Leo's tournament and my learning is simply to choose a different first move after a loss. With my very small manually edited book(only few hundreds of positions) there are big chances that movei will lose the same game twice if I do not do it. For testing I prefer to use the nunn2 match and test suites. Uri
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