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Part 2 HG close race good board cube efficiency

Posted By: Daniel Murphy
Date: Saturday, 7 June 2014, at 3:48 p.m.

In Response To: Part 2 HG close race good board cube efficiency (Bob Koca)

Bob, in the 90 vs. 90 position — 90v90, straight race, redouble? — something is wrong with either your rollout or Gnubg's, below, and I don't think the Gnubg rollout is wrong.

The score (after 0 games) is: Us 0, Them 0

Move number 5: Them on roll, cube decision?

Us90

' ' '3X3X3X3X3X ' ' ' '

' ' '3O3O3O3O3O ' ' ' '
Them90
Position ID: uLs7AAC4uzsAAA Match ID: UQkAAAAAAAAE

• Them doubles

Alert: wrong double ( -0.3299)! [very bad]

Cube decision
Rollout cubeless equity +0.1781
Cubeful equities:
1.No double +0.3900
2.Double, pass +1.0000 +0.6100
3.Double, take +0.0602 -0.3299
Proper cube action:No redouble, take (35.1%)
Rollout details
WinW gW bg LoseL gL bgCubelessCubeful
Player Them owns 2-cube0.58910.00000.0000-0.41090.00000.0000 +0.1781 +0.3900
Standard error0.00030.00000.0000-0.00030.00000.0000 0.0005 0.0041
Player Us owns 4-cube0.58870.00000.0000-0.41130.00000.0000 +0.3548 +0.0602
Standard error0.00030.00000.0000-0.00030.00000.0000 0.0012 0.0074
Full cubeful rollout with var.redn.
93 games, Mersenne Twister dice gen. with seed 716203915 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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