Re: [Bug-gnubg] Optional redouble, or is it automatic

[Joern Thyssen]

On Mon, Sep 09, 2002 at 12:28:05PM +0000, Joern Thyssen wrote
> On Mon, Sep 09, 2002 at 01:19:57PM +0200, Jim Segrave wrote
> > On Mon 09 Sep 2002 (11:10 +0100), Ian Shaw wrote:
> > > Why is this type of position called an "optional redouble"? Surely the
> > > redouble is automatic. I guess the 2-ply analysis is looking ahead and
> > > automatically doubling on the next roll so it sees no loss of equity.
> > > 
> > >     GNU Backgammon  Position ID: 2W4AAGdsbRMBGA
> > >                     Match ID   : AgGgAAAAEAAA
> > 
> > Odd - using today's build with evaluation set to world-class++ for
> > chequer and cube play I get the following evaluation:
> > 
> > No redouble         : +1.201
> > Redouble, take      : +1.347   (+0.146)
> > Redouble, pass      : +1.000   (-0.201)
> > 
> > Correct cube action: Too good to redouble, pass
> > 
> > Which, to my untrained eye looks far more reasonable.
> 
> O is on roll... 15% looks reasonable with 2 chequers on the bar. Did you
> reverse the position to get X on roll?

Argh, sorry, I got the position wrong!

I get too good as well...

Jørn

-- 
Joern Thyssen, PhD
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