Author: Robert Allgeuer
Date: 07:28:59 11/21/03
Go up one level in this thread
On November 21, 2003 at 09:46:02, Uri Blass wrote: >On November 21, 2003 at 09:10:37, Robert Allgeuer wrote: > >>On November 20, 2003 at 22:44:28, Dann Corbit wrote: >> >>>On November 20, 2003 at 22:41:09, Dann Corbit wrote: >>> >>>>On November 20, 2003 at 22:27:14, Dann Corbit wrote: >>>> >>>>>On November 20, 2003 at 22:21:46, Dann Corbit wrote: >>>>> >>>>>>On November 20, 2003 at 19:50:12, Uri Blass wrote: >>>>>> >>>>>>>On November 20, 2003 at 18:57:24, J. C. Boco wrote: >>>>>>> >>>>>>>>Doubling the processor speed or the time for thinking adds about 80 points to >>>>>>>>the SSDF-computer-ratings. But PC's are already running so fast that doubling >>>>>>>>their speed might mean searching at 15ply instead of 14ply. >>>>>>> >>>>>>>How do you get it? >>>>>>> >>>>>>>Based on the ssdf list even being 3 times faster does not give 80 elo. >>>>>>>A1200 is often more than 3 times faster than K6-450 >>>>>>> >>>>>>>Uri >>>>>> >>>>>>This query: >>>>>>SELECT a.engine, (a.Elo - b.Elo)/(1200.0/450.0) AS EloDiff >>>>>>FROM Ssdf AS a, Ssdf AS b >>>>>>WHERE a.Engine = b.Engine >>>>>> >>>>>>And >>>>>> a.Hardware like "*1200 MHz*" >>>>>> >>>>>>And >>>>>> b.Hardware like "*450 Mhz*" >>>>>> >>>>>>Order by (a.Elo - b.Elo)/(1200.0/450.0) Desc >>>>>> >>>>>>Returns this result set: >>>>>> >>>>>>engine EloDiff >>>>>>Gandalf 4.32h 50.625 >>>>>>Crafty 18.12/CB 50.25 >>>>>>Gandalf 5.0 42 >>>>>>Fritz 7.0 42 >>>>>>Deep Fritz 7.0 41.25 >>>>>>Rebel Century 4.0 40.125 >>>>>>Hiarcs 8.0 36.75 >>>>>>Chess Tiger 14.0 CB 32.25 >>>>>>Gambit Tiger 2.0 27.375 >>>>>>Deep Fritz 25.125 >>>>>>Junior 7.0 22.875 >>>>>>Chess Tiger 15.0 20.625 >>>>>>Shredder 5.32 20.25 >>>>>> >> >>I do believe that the formula should be >>(a.Elo - b.Elo)/ld(1200.0/450) instead of >>(a.Elo - b.Elo)/(1200.0/450.0) >>with ld being the log to the base 2. >> >>With this dataset this would give roughly a median (i.e. Hiarcs) of 69 ELO >>points gain for doubling processor speed, minimum of 38 for Shredder 5.32, max >>95 for Gandalf (under the condition that processor speed really scales linearly >>with the clock rate). >> >>Robert > >I believe that it is less than it because 1200/450 is not the right ratio >because there is a difference between faster and bigger. > >1200 is usually more than 3 times faster than 450 and I read that for some >programs like gandalf it is about 5 times faster > >Uri Yes it is certainly all a crude approximation Robert
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