Jun 28

One on the Bar (2)

By ace Backgammon, Where Gnu errs Add comments

The score (after 10 games) is: gnubg 8, ace 9 (match to 17 points)

Move number 19: gnubg on roll, cube decision?

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

Pip counts: gnubg 112, ace 110
Position ID: zTYHA0DLbgYBDA Match ID: MAEgAoAASAAA

• gnubg doubles

Alert: wrong double ( -0.066)! [bad]

Cube decision
2-ply cubeless equity +0.375 (Money: +0.379)
  0.619 0.247 0.003 – 0.381 0.107 0.003
Cubeful equities:
1. No double +0.600  
2. Double, pass +1.000 +0.400
3. Double, take +0.534 -0.066
Proper cube action: No double, take (14.3%)

 

Cube decision
Rollout cubeless equity +0.441 (Money: +0.430)
Cubeful equities:
1. Double, take +0.704  
2. Double, pass +1.000 +0.296
3. No double +0.700 -0.004
Proper cube action: Double, take
Rollout details
  Win W g W bg   Lose L g L bg Cubeless Cubeful
Centered 1-cube 0.646 0.239 0.003 - 0.354 0.101 0.004 +0.441 +0.700
Standard error 0.001 0.002 0.000 - 0.001 0.001 0.000 0.003 0.009
Player ace owns 2-cube 0.658 0.241 0.004 - 0.342 0.102 0.005 +0.939 +0.704
Standard error 0.001 0.002 0.000 - 0.001 0.001 0.000 0.008 0.011
Full cubeful rollout with var.redn.
1296 games, Mersenne Twister dice gen. with seed 1110528750 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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