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Rollout: More subtle than many people think
Posted By: Daniel Murphy In Response To: Rollout: More subtle than many people think (Timothy Chow)
Date: Saturday, 7 July 2012, at 6:20 p.m.
Comparing the two positions after the double hit, there is a big swing on White's 12 responding numbers that enter one checker without hitting (62 63 64 52 53 54) -- Double/Pass in the original position with Blue's direct shot at a blot on Opponent's 8 point, Double/Take in the alternate position.
Blue on roll after 62 63 or 64
White 126
Blue 56 Position ID: G9sIiUD9uwEACA Match ID: UgkAAAAAAAAA
Cube decision Rollout cubeless equity +0.493868 Cubeful equities: 1. Double, take +0.680935 2. Double, pass +1.000000 +0.319065 3. No double +0.571038 -0.109897 Proper cube action: Redouble, take Rollout details
Win W g W bg Lose L g L bg Cubeless Cubeful Blue owns 4-cube 0.610368 0.330422 0.003137 - 0.389632 0.057916 0.002511 +0.493868 +0.571038 Standard error 0.002244 0.002898 0.000509 - 0.002244 0.002559 0.000505 0.006306 0.010416 Player White owns 8-cube 0.612630 0.324977 0.003126 - 0.387370 0.060181 0.001910 +0.982542 +0.680935 Standard error 0.002123 0.002823 0.000456 - 0.002123 0.002327 0.000364 0.011994 0.018581 Full cubeful rollout with var.redn. 441 games, Mersenne Twister dice gen. with seed 920356811 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: 1-ply cubeful prune
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