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Subject: Re: 200 games with same program, 2xhardware, percentage of loss and elo

Author: Robert Hyatt

Date: 07:22:46 01/07/02

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On January 07, 2002 at 10:02:37, James T. Walker wrote:

>It's more or less accepted that a doubling of speed gives only about 50-70 elo
>points increase.  Therefore your chart makes not sense.  If we use a compromise
>of say 60 elo increase the 2000Mhz machine would score approximately 58.5%.
>Also there is no reason for this percentage to vary with time controls using the
>same engine.
>Jim


Actually there is a _big_ reason why the data came out as it did.  Look at
anybody's results where they used the _same_ program, but played one copy at
depth=N and another at depth N-1.  At shallow depths, N wipes N-1 out.  As the
depth goes deeper, N does't do nearly as well.  IE 4ply to 3ply, for the
_same_ program, is a 33% deeper search for 4 ply.  For 10 ply vs 11 ply,
the difference is 10% deeper...




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