I just rolled out a cube decision and gnubg evaluated "no double" at
greater than +1.000 equity despite the fact that a gammon was no longer
possible. Below is the text output; I can email the .sgf file if anyone
wants it.
Tim
The score (after 0 games) is: gnubg 0, tchow 0
Match Information:
Date: 08/21/2009
Move number 1: gnubg on roll, cube decision?
GNU Backgammon Position ID: bgAAULZtEwAiAA
Match ID : AQEAAAAAAAAA
+12-11-10--9--8--7-------6--5--4--3--2--1-+ O: gnubg (Cube: 2)
| O O | | O O O O O X | 0 points
| O | | O O O O O | On roll
| | | |
| | | |
| | | |
^| |BAR| |
| | | | X
| | | | X
| | | X | XX
| | | X X | XX
| | X | O X X O | XX 0 points
+13-14-15-16-17-18------19-20-21-22-23-24-+ X: tchow
Pip counts: O 108, X 61
* gnubg doubles
Alert: wrong double ( -0.167)!
Rollout details:
Player gnubg owns 2-cube:
0.828 0.000 0.000 - 0.172 0.007 0.001 CL +0.647 CF +1.167
[0.002 0.000 0.000 - 0.002 0.000 0.000 CL 0.004 CF 0.010]
Player tchow owns 4-cube:
0.859 0.000 0.000 - 0.141 0.006 0.001 CL +1.422 CF +1.325
[0.002 0.000 0.000 - 0.002 0.000 0.000 CL 0.008 CF 0.010]
Full cubeful rollout with var.redn.
1296 games, Mersenne Twister dice gen. with seed 866958217 and
quasi-random dice
Play: 0-ply cubeful [expert]
Cube: 0-ply cubeful [expert]
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