Re: [Bug-gnubg] standard error in cubefull 2ply rollouts

[Achim Mueller]

I have a similar standard error with the following position:

4PPgAVDMzuABKA MBkgArAAQAAA

Rollout cubeless equity   +0.662  (Money:  +0.664)
  Cubeful equities:
  1.  Double, pass   +1.000   
  2.  Double, take   +1.001   +0.001
  3.  No double   +0.919   -0.081
  Proper cube action:  Double, pass
  Rollout details
   Win  W g  W bg     Lose  L g  L bg  Cubeless  Cubeful
  Centered 1-cube  0.701  0.309  0.018  -  0.299  0.062  0.002   +0.662
+0.919
  Standard error  0.015  0.007  0.002  -  0.015  0.002  0.000   0.016
0.288
  Player ace owns 2-cube  0.703  0.313  0.017  -  0.297  0.061  0.003
+1.383   +1.001
  Standard error  0.002  0.003  0.002  -  0.002  0.001  0.000   0.010
0.015
  Full cubeful rollout with var.redn.
  1296 games, Mersenne Twister dice gen. with seed -355498708 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]


Here the standard error is 0.288

Ciao

Achim