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Subject: Re: PB-ON vs PB-OFF (final results)

Author: Dave Gomboc

Date: 07:59:51 10/15/99

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On October 15, 1999 at 04:42:00, Ed Schröder wrote:

>To enrich the discussion about the value of the "Permanent Brain" (PB) I
>have started 2 experiments with Rebel Century (RC) which will give some
>data for a better judgement of the value (in elo) of the permanent brain.
>
>Thinking it all over I still believe that the best way to provide data is
>to test the SAME program (PB_ON) versus (PB_OFF).
>
>Arguments:
>
>#1. Both programs are equal in strength.
>
>#2. There is no single evidence (yet) that the % of predicted moves is
>higher playing the same program. Rebel (or any other program) percentage
>against Program_X might be 25% and against Program_Y 75% and against
>itself maybe 50%, nobody knows.
>
>The final result:
>
>Experiment-1:
>RC (PB=ON) vs RC (PB=OFF)
>100 auto232 games
>Time control: 60 secs average.
>Hardware: 4xPII-266 + 2xPII-450
>Result: 61-39
>
>Experiment-2:
>RC (PB=ON) vs RC (PB=OFF)
>100 auto232 games
>Time control: RC (PB=ON) 30 sec average
>Time control: RC (PB=OFF) 60 sec average
>Hardware: 4xPII-266 + 2xPII-450
>Status: 57-43
>
>I find the 57-43 result quite shocking. I expected (and hoped for) a close win
>for the PB_ON version but not a clear victory.
>
>I think it would be a wise thing if others are willing to do the same
>experiment with other programs. Somehow I have the feeling you will
>totally different results doing so.
>
>Ed Schroder

Those looks like reasonably big advantages.  My eyes are only half-open right
now, but does anyone else want to come up with some expected ELO differences
based on those results?

Dave



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