Author: Norm Pollock
Date: 05:11:25 12/14/05
Go up one level in this thread
On December 14, 2005 at 06:16:31, Vincent Lejeune wrote: >On December 14, 2005 at 06:10:11, Norm Pollock wrote: > >>On December 14, 2005 at 05:30:59, Vincent Lejeune wrote: >> >>>On December 14, 2005 at 05:22:16, Gian-Carlo Pascutto wrote: >>> >>>>On December 14, 2005 at 05:13:48, Joachim Rang wrote: >>>> >>>>>On December 14, 2005 at 05:06:41, Mimic wrote: >>>>> >>>>>>============================================================== >>>>>>Rybka 1.0 Beta 32-bit +282-130=388 59.50% 476.0/800 +66 >>>>>>-------------------------------------------------------------- >>>>>>Fruit 2.2.1 +130-282=388 40.50% 324.0/800 -66 >>>>>>============================================================== >>>>>> >>>>>> Games Rybka >>>>>>======================== >>>>>> 100 +31 >>>>>> 200 ----- +33 >>>>>> 300 +50 >>>>>> 400 ----- +50 >>>>>> 500 +53 >>>>>> 600 ----- +60 >>>>>> 700 +63 >>>>>> 800 ----- +66 >>>>>>======================== >>>>>> >>>>>>Pentium M Dothan 2.52Ghz >>>>>>32MB Hash >>>>>>No EGTB >>>>>> >>>>>>Mimic >>>>> >>>>>has Rybka some hidden learning? The steady increase of the rating difference is >>>>>surprising. >>>> >>>>The rating difference didn't increase, just the plus score. (And it wasn't >>>>steady, either) >>>> >>>>-- >>>>GCP >>> >>> >>>No, +66 is the rating difference, not the score difference. >>> >>>Surprisingly it doubled between 200 and 800 games... >>>Who know it will be after 1200 games ... >> >>No, the rating difference takes into account changes in BOTH elos. Therefore the >>rating difference is +132. > > >I think you're wrong. This table show that Rybka 1.0 Beta 32-bit is 66 Elo >stronger than Fruit 2.2.1 (and logically Fruit 2.2.1 is 66 Elo weaker than Rybka >1.0 Beta 32-bit) A funny thing happened while I was trying to rebut your argument. I tested things in elostat and this is what happened. I downloaded the 800 games, stripped away comments etc, and put the games into elostat. I gave both engines a starting elo of 2500 and here is what I found: Program Elo + - Games Score Av.Op. Draws 1 Rybka 1.0 Beta 32-bit : 2533 17 17 800 59.5 % 2467 48.5 % 2 Fruit 2.2.1 : 2467 17 17 800 40.5 % 2533 48.5 % So it looks like you are correct! If Rybka was previously rated let's say 400 points higher at the start, then Rybka would lose points and Fruit would gain. ;-)
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