Author: Bryan Hofmann
Date: 16:06:44 02/01/06
Go up one level in this thread
On February 01, 2006 at 02:17:40, Uri Blass wrote: >On February 01, 2006 at 01:50:23, Ryan B. wrote: > >>On January 31, 2006 at 23:07:08, walt irvin wrote: >> >>>in a rybka vs hydra match ,,,with rybka using a athlon 3800 12 game match 40 >>>moves in 2 hours what is the predicted score ??????????? >>> >>>mine is hydra 9/3 >>> >>>walter >> >>I think your prediction is very good. What I think many people fail to realize >>about Hydra is that it is a dedicated chess machine so it does not suffer the >>same overheads that PC chess engines have. Also Software optimized for just one >>exact platform can be very fast compared to traditional PC programs. >> >>Ryan > >I do not agree. > >By that logic Crafty with 8 processors can also beat Rybka with one processor >but it is probably not the case. > >The fact that hardware that is dedicated for one task has a potential advantage >does not prove that hydra is better. > >The facts are that Rybka is leading the CEGT list even if you consider only 32 >bits and not one of the better hardware participants. > >This is from the CEGT rating list. > >2 Rybka 1.01 Beta 13-13b 32-bit 2886 45 45 189 74.1 % 2704 28.6 % >6 Deep Shredder 9.12 x64 2CPU 2822 35 34 283 64.7 % 2717 31.1 % > >14 Shredder 9 2754 8 8 4776 63.3 % 2660 31.8 % >34 Crafty Cito 1.4.2 64-bit 2CPU 2695 59 58 106 63.7 % 2598 27.4 % > >As you can see even the combination of 64 bits and 2 cpu does not help when you >have inferior program. > >If 64 bits+2 cpu gives does the program 3 times faster then you have: Not 3x, the 32bit vs 64 bit with the above program under windows gives your 27% increase. Running Crafty on a dual vs a single gives you about an 80% increase (have not tested but seen results posted of a 1.8/1.9). this would mean about a 2.1. What is interesting is that if you compare the 32 bit version that was run in the CEGT vs the dual version you see that there is an increase of 160+ ELO. While the 2 CPU version has not run as many games as the single it sort of shows the 2x speed up is worth more then the 50 ELO points I have seen posted here before. Bryan > >Crafty*3<Shredder >Shredder*3<Rybka and in other words > >Crafty*9<Rybka. > >Uri
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