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Subject: Re: SSDF figures suggest 35 Elo per doubling of speed, not 50 or 80 Elo

Author: Drexel,Michael

Date: 21:05:27 11/20/03

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On November 20, 2003 at 22:58:25, Dann Corbit wrote:

>On November 20, 2003 at 22:51:04, Uri Blass wrote:
>
>>On November 20, 2003 at 22:35:43, Dann Corbit wrote:
>>
>>>as we often see cited.
>>>
>>>See:
>>>http://www.talkchess.com/forums/1/message.html?329011
>>
>>No
>>
>>Assume that all the program of the ssdf have 2500 at 100 mhz and 2570 at 200
>>Mhz.
>>
>>Your formula is going to give them 35 elo per doubling and not 70 elo.
>
>You are right.  I divided by the ratio of the two speeds to normalize and forgot
>to divide by 0.5 (or multiply by 2).
>
>70 is the better figure.


OK,my random sample was not representative.

I get 69.45 ELO per doubling, however all this math is not quite correct anyway.

The result of Gandalf 5.0 is based on 102 games...

47 Gandalf 5.0  128MB K6-2 450 MHz         2538   73   -68   102   60%  2465

...and the result of Deep Fritz is based on 1071 games for example.

25 Deep Fritz  128MB K6-2 450 MHz          2649   22   -21  1071   58%  2589

So this result is almost meaningless IMO.
You can't ignore the number of games.

Michael






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