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Rollout of TheProdigy's backgame problem

Posted By: Timothy Chow
Date: Tuesday, 9 February 2010, at 3:43 a.m.

On January 31, TheProdigy posted a backgame cube action problem. I got tired of waiting for someone else to post a rollout so here it is. I suppose this post should really be placed in that thread, but since it's been more than a week I figured most people wouldn't see it if I did that.

GNU says it's a take ATS. I haven't rolled it out for money; maybe I'll do that next.

The score (after 2 games) is: Stick 2, TheProdigy 2 (match to 11 points)

Move number 4: gnubg on roll, cube decision?

Stick	66
TheProdigy	154
Position ID: my0gwDHuuR0AAA Match ID: AQFgASAAEAAA

Cube decision
Rollout cubeless equity		+0.676	(Money: +0.684)
Cubeful equities:
1.	Double, take	+0.922
2.	Double, pass	+1.000	+0.078
3.	No double	+0.867	-0.055
Proper cube action:		Redouble, take
Rollout details
Win W g W bg Lose L g L bg Cubeless Cubeful Player gnubg owns 2-cube 0.652 0.359 0.043 - 0.348 0.022 0.000 +0.676 +0.867 Standard error 0.002 0.002 0.001 - 0.002 0.001 0.000 0.004 0.008 Player tchow owns 4-cube 0.651 0.357 0.070 - 0.349 0.018 0.000 +1.313 +0.922 Standard error 0.002 0.002 0.002 - 0.002 0.001 0.000 0.010 0.013
Full cubeful rollout with var.redn.
1296 games, Mersenne Twister dice gen. with seed 844741544 and quasi-random dice
Play: supremo 2-ply cubeful prune [world class]
keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
Skip pruning for 1-ply moves.
Cube: 2-ply cubeful prune [world class]

Messages In This Thread

• Rollout of TheProdigy's backgame problem
  Timothy Chow -- Tuesday, 9 February 2010, at 3:43 a.m.
  • money RO
    Bob Koca -- Tuesday, 9 February 2010, at 3:51 a.m.
    • money RO
      Timothy Chow -- Tuesday, 9 February 2010, at 3:57 p.m.
  • Rollout
    Stick -- Tuesday, 9 February 2010, at 4:42 a.m.
    • Rollout
      Timothy Chow -- Tuesday, 9 February 2010, at 3:22 p.m.
  • Rollout of TheProdigy's backgame problem
    Daniel Murphy -- Wednesday, 10 February 2010, at 12:27 a.m.
    • Rollout of TheProdigy's backgame problem
      Stick -- Wednesday, 10 February 2010, at 12:41 a.m.
      • Rollout of TheProdigy's backgame problem
        Daniel Murphy -- Wednesday, 10 February 2010, at 8:22 p.m.
    • Rollout of TheProdigy's backgame problem
      Timothy Chow -- Wednesday, 10 February 2010, at 6:25 p.m.