Author: Dave Gomboc
Date: 15:41:22 04/02/00
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On April 02, 2000 at 18:24:06, Ed Schröder wrote: >On April 02, 2000 at 16:33:24, blass uri wrote: > >>On April 02, 2000 at 15:46:54, Dave Gomboc wrote: >> >>>It sounds like your tunable policy paid off, in terms of people discovering good >>>adjusted parameters? >>> >>>Dave >> >>Chess knowledge=25 is not an idea of me. >> >>I suggested to use it only after I read in Ed's site that Ed found that it is an >>improvement against computers and maybe also an improvement against humans. >> >>I found also (after I read that Ed found that knowledge=25 is an improvement) >>that Rebel(knowledge=0) does not lose in a result of almost 60:0 against >>Rebel(chess knowledge=500) at 7 plied depth and it convinced me that Rebel knows >>some important things even with knowledge=0. >> >>I think that the numbers of the chess knowledge parameter were misleading and >>the minimal number should be clearly bigger than 0. >> >>I believe that this is the reason that people did not try to reduce the chess >>knowledge parameter in the Rebel century personality contest. >> >>Uri > >I also did not expect it either that lowering the Chess Knowledge parameter >would make Rebel stronger. In my tests I always increased the value of >the Chess Knowledge parameter. When I did a test with [Chess Knowledge=25] >(it was just curiosity) I was surprised to see the enormous speed gain of >the search. Then [Chess Knowledge=25] suddenly had my full attention. > >So the improvement was discovered by accident. No real surprise as most >of the time it goes that way. Chess remains a mystery, it is like a maze >of 2^64 entries and no exit. > >Ed That's kind of funny, but I suppose it shouldn't be completely unexpected. If you try increasing the amount of knowledge, and it performs worse, it makes sense to try reducing it instead... and there have been other stories of people removing knowledge from their programs before. Dave
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