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Subject: Re: Computer Ratings vs Number of Processors

Author: Anthony Cozzie

Date: 11:04:05 08/19/03

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On August 19, 2003 at 13:02:33, David H. McClain wrote:

>Has anyone ever calculated approximate rating differences in points between
>programs run on a single processor versus the same program run on multiple
>processor computers?  It would be interesting to evaluate the Deep Junior
>program played against Kasparov on a eight processor machine versus the same
>single processor version program played on a single processor machine.  What
>percentage would a program's strength increase by adding processors?  Is this
>known?
>
>Would evaluations be similar for other "deep" multiple processor built programs
>versus their same version built for single threads?
>
>Dave

I seem to recall 50 ELO/2x processor speed as a rule of thumb.

Considering search inefficiencies, I think that comes out to about 125 ELO.

anthony



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