Author: Uri Blass
Date: 20:51:54 02/27/06
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On February 27, 2006 at 22:25:44, Ryan B. wrote: >On February 27, 2006 at 21:55:05, Charles Wane wrote: > >>I just got finished playing a four game match at game/30 min between Hiarcs 10 >>and Rykba 13d, Hiarcs had an Athlon64 3200 with 128mb hash, against Rykba >>running on a Pent II 450 with 128mb hash. The score was 2-2 !! Yesterday I >>played about 14 games between rykba running on the same 450 against Deep fritz 8 >>on the Athlon64 and rykba won the majority of the games!! Iv'e never seen a >>program with such inferior hardware play so strong. I actually rated rybka on >>the 450 on chessmaster 10th but letting rybka play the various personalities it >>ended up with a rating of 3055!! And lost only one game , running all on a mere >>Pent II 450. I guess Rybka's case the chess knowledge means much more then the >>speed of the program? I don't know cause I'm not a computer chess expert, but >>all this seems bizarre. > >From what I have seen Rybka has great knowledge but not in the way of >traditional chess knowledge by having a huge evaluation function. Like all >chess engines I expect Rybka to play better on faster hardware but I so far >think the gain of fast hardware is less than most other programs. From what I >see Rybka ranks higher in blitz than long tc games. This is at least the case >on the CEGT rating list. > >Ryan I do not think that you are right here and rybka does not rank higher in blitz. Let compare the 32 bit versions of rybka blitz 4 Rybka 1.01 Beta 13b 32-bit 2820 20 31 652 69.8 % 2675 23.0 % 5 Rybka 1.0 Beta 32-bit 2811 9 12 3139 68.1 % 2679 29.2 % long time control 3 Rybka 1.01 Beta 13-13b 32-bit 2869 28 28 494 73.9 % 2689 27.9 % 5 Rybka 1.0 Beta 32-bit 2823 10 10 3670 68.8 % 2686 31.1 % You can see that rybka has higher ranking at long time control. I believe that the 64 bit version simply score too much to have reliable rating because it played in the long time control against opponents that are too weak(more than 300 elo weaker than it). Uri
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