RE: [Bug-gnubg] Confusing 2-away 2-away cube action

[Ian Shaw]

> -----Original Message-----
> From: Joern Thyssen [mailto:address@hidden
> 
> On Wed, Nov 27, 2002 at 09:39:28AM -0000, Ian Shaw wrote
> >     GNU Backgammon  Position ID: 4HPwAFiYz8gFAg
> >                     Match ID   : MAFgAZAASAAA
> >     +-1--2--3--4--5--6-------7--8--9-10-11-12-+  O: GnuBg
> >     | X        O     O |   |    O        O  X |  9 points
> >     | X        O     O |   |    O           X |  On roll
> >     |                O |   |                X |  
> >     |                O |   |                X |  
> >     |                O |   |                  |  
> >     |                  |BAR|                  |^ 11 point 
> match (Cube: 1)
> >     |                X |   |                  |  
> >     |                X |   |                  |  
> >     |                X |   |    X           O |  
> >     |                X |   |    X           O |  
> >     |             O  X | X |    X        O  O |  9 points
> >     +24-23-22-21-20-19------18-17-16-15-14-13-+  X: Ian
> > 
> > Cube analysis
> > 2-ply cubeless MWC  62.70% (Money:  +0.634)
> >   0.705 0.254 0.021 - 0.295 0.049 0.001
> > 1. Double, take         54.86%
> > 2. Double, pass         70.00%  (+15.14%)
> > 3. No double            54.24%  ( -0.62%)
> > Proper cube action: Double, take
> > 
> > I am using the W-H MET, so the take point is 30%. 2-ply 
> evaluation has
> > X's winning chances at 29.5%. There is no recube value, so 
> this can't
> > be a take.
> 
> I can't reproduce the problem. I get:
> 
> 
> Cube analysis
> 2-ply cubeless MWC  65.15% (Money:  +0.671)
>   0.714 0.269 0.024 - 0.286 0.049 0.001
> 1. Double, pass         70.00%
> 2. Double, take         71.38%  ( +1.38%)
> 3. No double            68.88%  ( -1.12%)
> Proper cube action: Double, pass
> 
> Do you have a match saved?
> 
> Jørn
Sorry, no. And I can't reproduce it either. I can't even get the 0.295 losing 
chances, with a variety of settings. Put it down to some sort of operator 
error. I wasn't actually playing a match at the time; maybe I set something up 
wrongly.

--Ian