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Subject: Re: Update on Rebel -Lithuania Re-match?

Author: Ratko V Tomic

Date: 01:26:10 10/16/99

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> I don't see how anyone can call a result of 4-4 against 2400+ players
> a bad result, under normal time controls.

I guess, if someone takes the SSDF or similar comp-comp ratings as the real
rating interchangeable with human play ratings, one then expects a 2600 SSDF
program to convincingly beat 2450 player pool (70% points). In fact, if one were
to continue playing against the same human team, week after week, even if
Rebel's book gets updated and engine parameters adjusted between the matches,
its performance rating would keep dropping (not necessarily uniformly, but as a
moving average over a longer sequence). And if the fixed Rebel were to play such
sequence, the performance rating would drop much faster.

As to which level it would eventually stabilize at -- it would be the rating
just a bit above the strength of the weakest aspect of the program (probably
would settle somewhere between 2200 and 2300 on a 400-500 Mhz Pentium, due to
lack of planning beyond its 12-15 plies). Blitz, of course, is a different ball
game. (But so is the postal chess, in which none of the micro programs would
come out above the 2200.)



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