Author: Stuart Cracraft
Date: 22:49:44 12/15/05
Go up one level in this thread
On December 15, 2005 at 21:14:17, Ryan B. wrote: >On December 15, 2005 at 19:57:45, Uri Blass wrote: > >>On December 15, 2005 at 19:38:51, Stuart Cracraft wrote: >> >>>On December 15, 2005 at 19:18:37, Uri Blass wrote: >>>> >>>>I also agree and I never underestimated fruit's evaluation. >>>>It is possible that the main reason for it's superior evaluation is the idea of >>>>average between opening and endgame but it is fact that it has a superior >>>>evaluation. >>> >>>Really? Just the line from fruit:eval.c: >>> >>> eval = ((opening * (256 - phase)) + (endgame * phase)) / 256; >>> >>>I find that VERY hard to believe. That concept has been around a >>>very long-time. >> >>I do not read much source code of free programs so I do not know but I wonder >>if free source code programs before fruit use that idea and have for every term >>endgame evaluation and opening evaluation. >> >>I use it for some things and I learned the idea from fruit but most of my >>evaluation does not use that idea and I may rewrite the evaluation and test. >> >> >>> >>>You must propose something better. >>> >>>Superior evaluation? >>> >>>That code is trivially small. >>> >>>So, small is beautiful? >> >>bigger has the potential to be better but it is not always better. >>I believe that Rybka's evaluation is even better than fruit's evaluation but >>fruit's evaluation is better than the evaluation of most top programs including >>Shredder9. >> >>Uri > > >A strong point of Fruits eval is that it is more accurate than it is deep. Many >people think they will have a better eval by having more knowledge but end of >having bad chess knowledge that does not work well this other knowledge in the >eval. > >Ryan Perhaps some kind soul could just take the Fruit 2.1 eval and implement it in their program and tell us the difference in Arena-play for the two of them in a round-robin with many others. Any takers?
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