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Re: [Bug-gnubg] Crawford Cubeful equity not matching cubeless during rol

From: Joern Thyssen
Subject: Re: [Bug-gnubg] Crawford Cubeful equity not matching cubeless during rollouts.
Date: Fri, 7 May 2004 05:30:23 +0000
User-agent: Mutt/

On Wed, May 05, 2004 at 03:08:35PM -0400, Eberlein, Robert (REBERLEI) wrote
> I have noticed bizarre results during rollouts of the Crawford game for
> matches.  The cubeless and cubeful equities should always match, since
> the cube cannot be turned.
> They seem to start out that way, but as the rollout proceeds each
> alternative getting rolled out on my Windows 2000 machine eventually
> shows a significant discrepancy between the cubeless and the cubeful
> equities.  I think the cubeful equities are messed up.  The simplest way
> to reproduce the problem is to start a 3 point match, resign a gammon on
> move 1 of game 1, and then analyze a 43 opener in game 2.  My rollouts
> were 0-ply (expert level) untruncated, with variance reduction.  I used
> gnubg 0.14.2 - dev 1.1578 040503.

I've committed a fix.


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