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Rollout: Slightly unusual late-midgame cube decision

Posted By: Timothy Chow
Date: Monday, 5 July 2010, at 4:28 a.m.

In Response To: Slightly unusual late-midgame cube decision (Timothy Chow)

I was, and am, quite surprised that the GNU rollout says, "No redouble." The equity is over 0.9, there seems to be considerable volatility, and it's still not a redouble? Crazy.

Cube decision
Rollout cubeless equity		+0.514
Cubeful equities:
1.	No double	+0.917
2.	Double, pass	+1.000	+0.083
3.	Double, take	+0.909	-0.008
Proper cube action:		No redouble, take (9.0%)
Rollout details
Win W g W bg Lose L g L bg Cubeless Cubeful Player tchow owns 2-cube 0.749 0.033 0.000 - 0.251 0.018 0.000 +0.514 +0.917 Standard error 0.000 0.001 0.000 - 0.000 0.000 0.000 0.001 0.002 Player gnubg owns 4-cube 0.752 0.046 0.000 - 0.248 0.020 0.001 +1.061 +0.909 Standard error 0.001 0.000 0.000 - 0.001 0.000 0.000 0.002 0.003
Full cubeful rollout with var.redn.
5184 games, Mersenne Twister dice gen. with seed 890201870 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

• Slightly unusual late-midgame cube decision
  Timothy Chow -- Sunday, 4 July 2010, at 3:53 a.m.
  • Slightly unusual late-midgame cube decision
    Paul Weaver -- Sunday, 4 July 2010, at 5:10 a.m.
  • Rollout: Slightly unusual late-midgame cube decision
    Timothy Chow -- Monday, 5 July 2010, at 4:28 a.m.
    • Rollout: Slightly unusual late-midgame cube decision
      Stick -- Monday, 5 July 2010, at 4:41 a.m.
      • XG RO
        Stick -- Monday, 5 July 2010, at 4:56 a.m.
        • XG RO
          Timothy Chow -- Monday, 5 July 2010, at 5:56 p.m.
          • XG RO
            Matt Cohn-Geier -- Monday, 5 July 2010, at 6:58 p.m.