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Rollout w/3 ply cube

Posted By: neilkaz
Date: Friday, 20 February 2009, at 7:23 p.m.

In Response To: My hat's off... (Christian Munk-Christensen)

3 ply cube comes much closer than 2 ply to estimating what is happening here since 2 ply badly underestimates how bad it is for White to have two checkers almost closed out.

The score (after 0 games) is: gnubg 2, ntk 1 (match to 9 points)

Move number 5: ntk on roll, cube decision?

gnubg74


 '1O4X3X '1O ' ' ' ' ' '

2O4O '3O1O2O ' ' ' '1O '

ntk92

Position ID: vAMAgO25BgFCAA Match ID: UQkgASAACAAA

• ntk doubles

Cube decision
Rollout cubeless equity +0.4917(Money: +0.4903)
Cubeful equities:
1.Double, pass +1.0000 
2.Double, take +1.0440 +0.0440
3.No double +0.8649 -0.1351
Proper cube action:Redouble, pass
Rollout details
 WinW gW bg LoseL gL bgCubelessCubeful
Player ntk owns 2-cube0.76230.00000.0000-0.23770.03230.0020 +0.4917 +0.8649
Standard error0.00090.00000.0000-0.00090.00060.0003 0.0020 0.0041
Player gnubg owns 4-cube0.77640.00000.0000-0.22360.03490.0082 +1.1705 +1.0440
Standard error0.00140.00000.0000-0.00140.00140.0011 0.0062 0.0073
Full cubeful rollout with var.redn.
2656 games, Mersenne Twister dice gen. with seed 817303748 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: 3-ply cubeful prune [grandmaster]

 

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