RE: [Bug-gnubg] tty version rollouts, equity & RNG seed

[Albert Silver]

> -----Original Message-----
> From: address@hidden [mailto:bug-gnubg-
> address@hidden On Behalf Of Gary Wong
> Sent: Monday, January 13, 2003 11:54 AM
> To: address@hidden
> Subject: Re: [Bug-gnubg] tty version rollouts, equity & RNG seed
> 
> On Mon, Jan 13, 2003 at 02:15:28PM +0100, Morten Wang wrote:
> > I'm confused by the numbers output when running gnubg with the '-t'
> > option.  What exactly are the numbers supposed to be.  The heading
is:
> >
> >          Win   W(g)  W(bg) L(g)  L(bg)  Equity   Cube E    n
> >

Note that there is still no column "Loss" for the losses.

                                Albert

> > I thought "Cube E" would be the cubeful equity, like it is on the
gtk
> > version, but instead the number seems to be something completely
> > different:
> 
> Yes, Cube E is supposed to be cubeful equity.
> 
> > Then, when I do a hint after the rollout, the shown equity is way
off:
> >
> > 3. Rollout          8/5 8/2                      Eq.:  +1.605 (
+1.819)
> >    0.391 0.067 0.002 - 0.609 0.082 0.002 CL  -0.234 CF  -0.395
> >   [0.001 0.001 0.000 - 0.001 0.001 0.000 CL   0.003 CF  +0.006]
> >     Full cubeful rollout with var.redn.
> >     2592 games, seed 692318375 using quasi-random dice and Mersenne
> Twister
> >     Play and cube: 2-ply cubeful 100% speed [world class]
> >
> > The -0.395 value should be correct.  +1.605 is easily +2.000-0.395
> > (the cube's turned in the game), but why that value?
> 
> No idea, something looks buggy...
> 
> > I'm also confused by the reported seed used.  The commands file I
used
> > had "set seed 1652552448" (which was the seed used when I ran the
> > rollout with 1ply in the gtk version).  Is there an overflow here?
> 
> Rollouts use their own seed -- "set rollout seed <n>" is the command
you
> need for that one.
> 
> > I'm not sure where to look for version info.  The last entry in the
> > Changelog is Sat 2003-01-11 11:29.  The code I have was checked out
> > from CVS a half hour later my time (noon CET).
> 
> Hmmm, this might explain part of the problem... the new cubeful
evaluation
> cache gave incorrect cubeful equities in some circumstances.
Hopefully
> this has been fixed since 2003-01-12.
> 
> Cheers,
> Gary.
> --
>    Gary Wong           address@hidden
> http://www.cs.arizona.edu/~gary/
> 
> 
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