David Fotland wrote:
The scalability study showed that mogo gains almost 100 rating points per
doubling of performance.
But on CGOS, there is mogo 1 CPU and mogo 4 CPU. I would expect the 4 CPU
mogo to be 150 rating points or more higher than 1 CPU. But it is actually
only 40 points higher.
I guess this is because in the rating study mogo was mostly playing other
mogo versions. A the faster mogo can see everything the weaker mogo sees,
and more.
But against other programs on CGOS, there will be weaknesses common to both
fast and slow mogo, that other programs might exploit.
Is the true scalability of mogo (against a variety of programs, or against
people) less than the rating study indicates?
It's possible. Most people believe that when the only difference
between 2 programs is how deep they look, the less deep version gets
victimized fairly badly. I'm undecided about how strong this effect
is, although I do believe it's a factor.
On CGOS most of the programs, while not identical, are very
similar. Does that also have an impact on the rating pool? If that
is impacting it too, that would decrease the mogo vs mogo effect.
The rating study includes games against Leela too. Next week when I
get back from my vacation, I will try voiding games not played between
different opponents, and see how it affects the curve. It probably
won't answer any questions but it might be a clue.
- Don
David
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