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Subject: Re: No one has answered my question with hard facts

Author: Ed Schröder

Date: 04:48:10 01/19/00

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>Posted by Tina Long on January 19, 2000 at 02:19:14:
>
>Pasted from the latest SSDF: 8 beats 9 by a point, 6 beats 7 by 5 points.
>
>My interpretation is "there was very little improvement in COMPUTER vs
>COMPUTER (sorry to shout) strength from Rebel6 to Rebel 9."
>
>Perhaps this is because the Author was concentrating on improving his COMPUTER
>vs HUMAN results, and preparing to pit his program against Grandmasters.
>
>All this conjecture would be clearer if both Rebel 10b and Rebel 10c had both
>appeared on SSDF (although I understand and accept why they're not on SSDF).
>
>Perhaps the results of these Rebel's are inaccurate due to Autoplayer problems
>(Ed?, Bertil?)

That is very hard to say. The damage is proven that's for sure. How much?
Impossible to tell.

>29 Rebel 8.0 Pentium 90 MHz                2438   18   -18  1435   55%  2403
>30 Rebel 9.0 Pentium 90 MHz                2437   23   -23   890   47%  2458

Hundreds of Rebel9 games were played with the wrong settings:
1) without Rebel's main-book
2) without Rebel9's learner

Also Rebel9 had a big bug in the hash table code. The effect was that the
bigger you made the hash table the worse Rebel9 (and previous Rebel's)
would play. Rebel9 with 13Mb played a lot better than with 28, 40 or 60 Mb
in fact 13 Mb performed best. Fixed since version 10c.

Ed

>  31 Hiarcs 6.0 Pentium 90 MHz               2434   18   -18  1437   51%  2430
>  32 Genius 5.0 DOS Pentium 90 MHz           2431   18   -18  1558   47%  2450
>  33 Hiarcs 5.0 Pentium 90 MHz               2427   38   -36   363   59%  2362
>  34 MChess Pro 6.0 Pentium 90 MHz           2412   17   -17  1726   45%  2445
>  35 Genius 3.0 Pentium 90 MHz               2408   26   -25   785   61%  2328
>  36 Rebel 6.0 Pentium 90 MHz                2407   31   -30   540   60%  2335
>  36 MChess Pro 5.0 Pentium 90 MHz           2407   26   -25   769   63%  2315
>  38 Genius 4.0 DOS Pentium 90 MHz           2404   23   -23   944   60%  2335
>  39 Rebel 7.0 Pentium 90 MHz                2402   26   -25   759   61%  2319
>
>Tina Long




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