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BGonline.org Forums
Cubeless Rollout
Posted By: Daniel Murphy In Response To: Cubeless Rollout (Michael Depreli)
Date: Wednesday, 28 April 2010, at 6:43 p.m.
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?
White 54
Blue 107 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
Win W g W bg Lose L g L bg Cubeless Cubeful Player Blue owns 2-cube 0.8306 0.0000 0.0000 - 0.1694 0.0162 0.0005 +0.6446 +1.1131 Standard error 0.0032 0.0000 0.0000 - 0.0032 0.0007 0.0001 0.0065 0.0174 Player White owns 4-cube 0.8759 0.0000 0.0000 - 0.1241 0.0126 0.0005 +1.4775 +1.4139 Standard error 0.0024 0.0000 0.0000 - 0.0024 0.0008 0.0001 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]
AnnotationCube 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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