Re: [Bug-gnubg] threading bug

[Christian Anthon]

Here is an example of the rollout with only three trials, obviously
this bugs goes beyond the std. errors (but perhaps only std errors are
effected in a long trial). One more command, if I read the code right
the cube rollout is set up through CommandRollout, while the moves
rollouts have their own setup in the gtk code. Perhaps that is why the
bug only effects the cube rollouts.

Christian.

Cube analysis
Rollout cubeless MWC  68.79% (Money:  +1.000)

Cubeful equities:
1. No double           103.59%
2. Double, pass         69.50%  (-34.09%)
3. Double, take         69.12%  (-34.47%)
Proper cube action: Too good to double, take
Rollout details:
Centered 1-cube:
 1.000 0.013 0.000 - 0.000 0.013 0.000 CL  68.79% CF 103.59%
[0.398 0.009 0.000 - 0.398 0.000 0.000 CL   1.14% CF  34.99%]
Player gnubg owns 2-cube:
 0.770 0.005 0.000 - 0.230 0.007 0.000 CL  69.96% CF  69.12%
[0.019 0.007 0.000 - 0.019 0.005 0.000 CL   0.39% CF   0.64%]
Full cubeful rollout with var.redn.
3 games, Mersenne Twister dice gen. with seed 1835638889 and quasi-random dice
Play: world class 2-ply cubeful prune [world class]
keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
Skip pruning for 1-ply moves.
Cube: 2-ply cubeful prune [world class]