Re: [Bug-gnubg] never too good?

[Joseph Heled]

Joern Thyssen wrote:
 
> > This is the position that prompted my temporary self doubt. (number 55 in
> > doubles.dat 0000)
> >
> >  GNU Backgammon  Position ID: BgAC2HZ7AAAEAA
> >                  Match ID   : MAGgAAAAAAAA
> >  +12-11-10--9--8--7-------6--5--4--3--2--1-+     O: gnubg
> >  |          X       |   |    O  O  O  O  O | O   0 points
> >  |                  |   |    O  O  O  O  O |     On roll
> >  |                  |   |    O     O       |
> >  |                  |   |    O             |
> >  |                  |   |                  |
> > ^|                  |BAR|                  |     5 point match (Cube: 1)
> >  |                  |   |                  | XX
> >  |                  |   |                  | XX
> >  |                  |   |                  | XX
> >  |                  | X |             X    | XX
> >  |                  | X |             X  O | XX  0 points
> >  +13-14-15-16-17-18------19-20-21-22-23-24-+     X: joseph
> >
> > My cubefull rollout gave
> >   ND  59.428%
> >   D/T 59.754%
> >
> > With D/D 57.5%, this is strange. Without gammons/bg's, ND should be <=
> > D/D.  I think this means X is making a great number of bad takes, or
> > in other words, this position (and others like it) are a good source
> > for finding positions where GNUbg makes cube errors.
> 
> I agree.
> 
> When I get home, I'll try doing a rollout with gnubg and see if I can
> reproduce the result, so eliminate possible bugs.
> 
> What were your rollout settings?

0-ply checkers and cube. This is the only setting for fibs2html and sagnubg
right now.

-Joseph

> 
> Jørn
> 
> --
> Joern Thyssen, PhD
> Vendsysselgade 3, 3., DK-9000 Aalborg, Denmark
> +45 9813 2791 (private) / +45 2077 2689 (mobile) / +45 9633 7036 (work)
> 
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