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501 Essential Backgammon Problems #50 -- Variants

Posted By: Igor
Date: Friday, 6 September 2013, at 2:29 a.m.

In Response To: 501 Essential Backgammon Problems #50 -- Rollouts (Igor)

First off, my pet peeve -- distribution of spares.

 White is Player 2 score: 0 pip: 165 Unlimited GameJacoby pip: 139 score: 0 Blue is Player 1
Blue to play 51

1.Rollout1Bar/24 11/6eq: +0.452
 Player:Opponent: 61.14% (G:16.11% B:0.63%)38.86% (G:8.19% B:0.26%) Conf.: ± 0.008 (+0.444...+0.460) - [100.0%]Duration: 24 minutes 59 seconds
2.Rollout1Bar/20 6/5* eq: +0.400 (-0.052)
 Player:Opponent: 59.90% (G:16.52% B:0.94%)40.10% (G:10.11% B:0.44%) Conf.: ± 0.010 (+0.390...+0.410) - [0.0%]Duration: 29 minutes 29 seconds
1 5184 Games rolled with Variance Reduction.
Dice Seed: 37291974
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

Next, it is the white blot on her bar point that gives us some incentive to start an exchange of hits.

 White is Player 2 score: 0 pip: 166 Unlimited GameJacoby pip: 138 score: 0 Blue is Player 1
XGID=-a--aaEBD--AcB---d-e-----A:0:0:1:51:0:0:1:0:10
Blue to play 51

1.Rollout1Bar/24 11/6eq: +0.413
 Player:Opponent: 60.22% (G:15.96% B:0.72%)39.78% (G:8.79% B:0.30%) Conf.: ± 0.003 (+0.410...+0.415) - [82.6%]Duration: 3 hours 43 minutes
2.Rollout1Bar/20 6/5* eq: +0.411 (-0.002)
 Player:Opponent: 59.93% (G:16.59% B:0.88%)40.07% (G:9.43% B:0.41%) Conf.: ± 0.002 (+0.409...+0.413) - [17.4%]Duration: 4 hours 18 minutes
1 46656 Games rolled with Variance Reduction.
Dice Seed: 37291974
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

Finally, giving white her bar point forces us to not stay back and wait to get primed.

 White is Player 2 score: 0 pip: 166 Unlimited GameJacoby pip: 138 score: 0 Blue is Player 1
XGID=-a--aaEBD--AcB---cbd-----A:0:0:1:51:0:0:1:0:10
Blue to play 51

1.Rollout1Bar/20 6/5* eq: +0.222
 Player:Opponent: 54.97% (G:15.55% B:0.88%)45.03% (G:10.75% B:0.52%) Conf.: ± 0.015 (+0.208...+0.237) - [100.0%]Duration: 8 minutes 03 seconds
2.Rollout1Bar/24 11/6eq: +0.104 (-0.118)
 Player:Opponent: 51.89% (G:14.91% B:0.59%)48.11% (G:10.44% B:0.41%) Conf.: ± 0.019 (+0.085...+0.123) - [0.0%]Duration: 7 minutes 08 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 37291974
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

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