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Re: [Bug-gnubg] Possible evaluation bug

From: Philippe Michel
Subject: Re: [Bug-gnubg] Possible evaluation bug
Date: Sat, 17 Feb 2018 23:37:45 +0100
User-agent: Mutt/1.9.3 (2018-01-21)

On Sat, Feb 17, 2018 at 02:09:33PM +0100, Øystein Schønning-Johansen wrote:

> So.... the conclusion must be that there is something funny with the
> movefilters. Don't know what.

0-ply evaluates the resulting positions quite haphazardly and there is 
only one move with 24/19 if the first eight choices. The wider filter 
gets three more and these four get the top spots at 2-ply. This is 
better but there are still a few reasonable 24/19 plays missing.

The 0-ply evaluations of the next roll position are probably rather poor 
as well since the 2-ply equities of these moves are much more dispersed 
than they should. 3-ply is better and 4-ply seems right, with all the 
plays breaking the 24 point sensibly in a 0.02 interval.

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