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[Bug-gnubg] Re: [Bug #3947] Display market window in annotation

From: Joern Thyssen
Subject: [Bug-gnubg] Re: [Bug #3947] Display market window in annotation
Date: Wed, 11 Jun 2003 13:48:26 +0000
User-agent: Mutt/1.4.1i

On Wed, Jun 11, 2003 at 09:29:05AM -0400, address@hidden wrote
> =================== BUG #3947: FULL BUG SNAPSHOT ===================
> http://savannah.gnu.org/bugs/?func=detailbug&bug_id=3947&group_id=66
> Submitted by: shaw                    Project: gnubg                        
> Submitted on: Wed 06/11/2003 at 13:29
> Originator Name:                      Originator Email:                     
> Bug Group:  Feature Request           Category:  Graphical User Interface   
> Release:  0.13-devel                  Build:                                
> Platform Version:  Windows 2000       Severity:  5 - Major                  
> Status:  Open                         Assigned to:  None                    
> Priority:  None                       Resolution:  None                     
> Summary:  Display market window in annotation
> Original Submission:  When we are discussing doubling decisions, we
> often talk about the takepoint. GnuBg (nor Snowie) does not display
> the takepoint for any position. I think it would be really useful to
> be able to see it. E.g. the takepoint is 20.5% but I only win 19%,
> which is why it's a drop. I would find this at least as useful than
> the equity differences for NoDouble/Pass/Take.
> Another oft made comparison is bewteen money play and match play, (for
> both cube & chequer plays).
> The market window tab has the dead cube & live cube values, but not
> the actual value used by GnuBg for its evaluation. 

It's only possible for 0-ply. 

For 2-ply the equity is an average of 441 positions. gnubg may use
different values of the cube efficiency for these, although it may be
possible to calculate an "effective" one based on the calculated cubeful
and cubeless equities, by solving

E(cubeful)=E(dead) * (1-x) + E(live) * x

E(live) is calulated from the live cube take points.

A similar argument can be used for the take point. gnubg doesn't think a
cube is pass because your wins are below the take point, rather it
thinks that it's a pass because the equity for "double, take" is larger
than "double, pass". Still, it would be possible to calculate an
"effective" take point.


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