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BGonline.org Forums
Rollout of cube decision after 7/3 6/5
Posted By: Timothy Chow In Response To: Rollout: Bearing in with no contact (Timothy Chow)
Date: Friday, 20 August 2010, at 1:59 a.m.
Given Stick's astute observation about GNU 2-ply's incorrect cube after 7/3 6/5, I rolled out the cube decision. The result narrows the gap between 10/5 and 7/3 6/5 considerably, to the point where the difference between the plays is negligible, though 7/3 6/5 seems to stay ahead by a hair.
Unlimited game: gnubg on roll, cube decision?
gnubg 60
tchow 59 Position ID: u2uHAAC2ewcAAA Match ID: MAEAAAAAAAAA
Alert: wrong double ( -0.008)!
Cube decision Rollout cubeless equity +0.377 Cubeful equities: 1. No double +0.570 2. Double, pass +1.000 +0.430 3. Double, take +0.562 -0.008 Proper cube action: No double, take (1.9%) Rollout details
Win W g W bg Lose L g L bg Cubeless Cubeful Centered 1-cube 0.689 0.000 0.000 - 0.311 0.000 0.000 +0.377 +0.570 Standard error 0.000 0.000 0.000 - 0.000 0.000 0.000 0.000 0.001 Player tchow owns 2-cube 0.689 0.000 0.000 - 0.311 0.000 0.000 +0.755 +0.562 Standard error 0.000 0.000 0.000 - 0.000 0.000 0.000 0.000 0.001 Full cubeful rollout with var.redn. 5184 games, Mersenne Twister dice gen. with seed 894370078 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]
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