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Re: [Bug-gnubg] random dice generator? hahahaaa

From: tchow
Subject: Re: [Bug-gnubg] random dice generator? hahahaaa
Date: Thu, 24 Aug 2017 13:03:24 -0400
User-agent: Roundcube Webmail/0.9.5

On 2017-08-24 02:59, Philippe Michel wrote:
On Wed, 23 Aug 2017, tchow wrote:

Something that might have a better chance of yielding superior results is to use 1-ply or even 2-ply for the variance reduction computation instead of 0-ply, at least for the first or second steps of a rollout trial.

This is already the case. Variance reduction for n-ply rollouts (n >=
1) is done at (n-1)-ply.

Obviously this would slow things down

This is not an issue. The costs of one more ply and variance reduction
in number of evaluations are similar (x 21). The worst case would then
be a slowdown of 100% instead of 5% or less, but the same evaluations
are used for both features so the slowdown is very small in practice,
as long as the variance reduction ply is less than that of the main

O.K., so let me rephrase my suggestion: What happens if we use n-ply variance reduction for an n-ply rollout, at least for the first or second steps of a rollout trial?


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