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Cubeless Rollout

Posted By: Daniel Murphy
Date: Wednesday, 28 April 2010, at 6:43 p.m.

In Response To: Cubeless Rollout (Michael Depreli)

Re search field size, I noticed that 11/8, the play John suggested, was ranked 24th in 2-ply analysis. I don't think it's the best play (Blue should trap (if he traps) by opening a small number), but ... 24th ??

Here's another redouble decision that Gnubg 2-ply mangles. I must say it's fun to catch bots making quadruple blunders. 3-ply correctly passes, but still underestimates Blue's equity.

The score (after 0 games) is: White 0, Blue 0

Move number 29: Blue on roll, cube decision?

White54


6X1O1O ' ' ' ' '1O ' ' '

2O1X2O4O2O2O ' ' ' ' ' '

Blue107

Position ID: PwAAkGZvAxAoAA Match ID: UQkAAAAAAAAA

• Blue doubles

Alert: wrong double ( -0.1131)!

Cube decision
Rollout cubeless equity +0.6446
Cubeful equities:
1.Double, pass +1.0000
2.Double, take +1.4139 +0.3008
3.No double +1.1131 +0.0000
Proper cube action:Redouble, pass
Rollout details
WinW gW bg LoseL gL bgCubelessCubeful
Player Blue owns 2-cube0.83060.00000.0000-0.16940.01620.0005 +0.6446 +1.1131
Standard error0.00320.00000.0000-0.00320.00070.0001 0.0065 0.0174
Player White owns 4-cube0.87590.00000.0000-0.12410.01260.0005 +1.4775 +1.4139
Standard error0.00240.00000.0000-0.00240.00080.0001 0.0101 0.0131
Full cubeful rollout with var.redn.
278 games, Mersenne Twister dice gen. with seed 854993617 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]


Annotation
Cube analysis
2-ply cubeless equity +0.5235
0.7719 0.0000 0.0000 - 0.2281 0.0197 0.0006
Cubeful equities:
1. Double, take +0.8919
2. Double, pass +1.0000 ( +0.1081)
3. No double +0.8526 ( -0.0393)
Proper cube action: Redouble, take

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