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

[Morten Wang]

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

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:

8/5 8/2  0.391 0.067 0.002 0.082 0.002 (-0.234)  0.530  2592

During the rollut the number is a decreasing value, and it looks like
the standard deviation, but I'm not sure.

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?

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?

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).


Morten!

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