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Another 5-prime cube decision

Posted By: Timothy Chow
Date: Thursday, 15 April 2010, at 1:29 a.m.

In Response To: How strong is a 5-prime? (Timothy Chow)

Here's another position that came up recently. OTB I doubled. The rollout again says that the double is optional despite Blue's strong advantage.

Unlimited game: tchow on roll, cube decision?

gnubg	123
tchow	117
Position ID: jT3DAAzY7g4IBA Match ID: cAkAAMAAAAAA

Cube decision
Rollout cubeless equity		+0.468
Cubeful equities:
1.	No double	+0.768
2.	Double, pass	+1.000	+0.232
3.	Double, take	+0.752	-0.016
Proper cube action:		No double, take (6.3%)
Rollout details
Win W g W bg Lose L g L bg Cubeless Cubeful Centered 1-cube 0.715 0.080 0.003 - 0.285 0.044 0.001 +0.468 +0.768 Standard error 0.001 0.001 0.000 - 0.001 0.001 0.000 0.002 0.005 Player gnubg owns 2-cube 0.718 0.080 0.003 - 0.282 0.044 0.001 +0.949 +0.752 Standard error 0.001 0.001 0.000 - 0.001 0.001 0.000 0.004 0.006
Full cubeful rollout with var.redn.
2592 games, Mersenne Twister dice gen. with seed 854298010 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]

Messages In This Thread

• How strong is a 5-prime?
  Timothy Chow -- Sunday, 11 April 2010, at 2:12 a.m.
  • Rollout: How strong is a 5-prime?
    Timothy Chow -- Monday, 12 April 2010, at 1:01 a.m.
    • Rollout: How strong is a 5-prime?
      Daniel Murphy -- Monday, 12 April 2010, at 1:16 a.m.
  • Another 5-prime cube decision
    Timothy Chow -- Thursday, 15 April 2010, at 1:29 a.m.