Author: Uri Blass
Date: 06:46:02 11/21/03
Go up one level in this thread
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
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