Jun 27

Backgame 13 (1)

By ace Backgammon, Where Gnu errs Add comments

The score (after 10 games) is: gnubg 11, ace 9 (match to 17 points)

Move number 41: ace on roll, cube decision?


+-24-23-22-21-20-19-+---+-18-17-16-15-14-13-+
| 1O 2X  ' 2X 2X 2X |   |  '  '  '  '  ' 1X |
|                   |   |                   |
|                   |   |                   |
| 3X 2O 3X 2O 3O 3O | 2 | 2O 1O  '  '  '  ' |
|                   | 1O|                   |
+--1--2--3--4--5--6-+---+--7--8--9-10-11-12-+

Pip counts: gnubg 184, ace 116
Position ID: ZhsIwDlmdwsAUA Match ID: UQkgArAASAAA


Alert: missed double ( -0.170)! [very bad]

Cube decision
2-ply cubeless equity +0.463 (Money: +0.402)
  0.584 0.313 0.048 – 0.416 0.121 0.006
Cubeful equities:
1. Double, pass +1.000  
2. Double, take +1.049 +0.049
3. No double +0.830 -0.170
Proper cube action: Redouble, pass

 


Alert: missed double ( -0.034)! [doubtfull]

Cube decision
Rollout cubeless equity +0.425 (Money: +0.352)
Cubeful equities:
1. Double, take +0.783  
2. Double, pass +1.000 +0.217
3. No double +0.749 -0.034
Proper cube action: Redouble, take
Rollout details
  Win W g W bg   Lose L g L bg Cubeless Cubeful
Player ace owns 2-cube 0.571 0.283 0.057 - 0.429 0.120 0.010 +0.425 +0.749
Standard error 0.002 0.002 0.002 - 0.002 0.002 0.001 0.005 0.011
Player gnubg owns 4-cube 0.555 0.265 0.113 - 0.445 0.123 0.018 +0.973 +0.783
Standard error 0.003 0.003 0.005 - 0.003 0.003 0.002 0.016 0.018
Full cubeful rollout with var.redn.
1296 games, Mersenne Twister dice gen. with seed -1814995671 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: 2-ply cubeful prune [world class]

 

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