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Re: [Bug-gnubg] Cubeful evaluation in Annotation window

From: Joern Thyssen
Subject: Re: [Bug-gnubg] Cubeful evaluation in Annotation window
Date: Fri, 7 Mar 2003 11:41:37 +0000
User-agent: Mutt/1.4i

On Fri, Mar 07, 2003 at 10:17:24AM -0000, Ian Shaw wrote
> In the Annotation window the cube action is identified as "Cubeless", even 
> though I have asked for a cubeful evaluation - the tooltip on the 1 2 3 4 
> buttons reads "Evaluate play on cubeful n-ply"
> In the example I have clicked the 3-ply button:
> * Woolsey doubles
> Alert: wrong pass ( -0.674)!Alert: wrong double ( -0.170)! [very bad]
> Cube analysis
> 3-ply cubeless equity  +0.470 (Money:  +0.481)

This is just for your information. The cubeless equity 3-ply is +0.470.

>   0.641 0.264 0.020 - 0.359 0.081 0.002
> 1. No double            +0.497
> 2. Double, pass         +1.000  ( +0.503)
> 3. Double, take         +0.326  ( -0.170)

The "No double" and "Double, take" are *always* calculated as cubeful
equities. In fact, gnubg can't anything else! If you toggle the cubeful
flag for cube decisions the difference is that the best move on the
intermediate plies is selected cubeless not cubeful. However, gnubg
still calculates cubeful equities.

For chequer play decisions the cubeful flag means that both the
resulting equity as well as the move selection on intermediate plies are
cubeful (or cubeless).

Does this make sense?


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