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501 Essential Backgammon Problems #139

Posted By: Igor
Date: Thursday, 24 October 2013, at 3:22 p.m.

In Response To: 501 Essential Backgammon Problems #139 (Igor)

Robertie recommends a permanent asset in the 3pt. But if we manage to escape one back checker we are going to have an upper hand in the ensuing priming battle. If we are hit back, it only improves our timing and allows to get an anchor from the bar.





White is Player 2

score: 0
pip: 148
Unlimited Game
Jacoby
pip: 144
score: 0

Blue is Player 1
XGID=-b--B-DBC----Bba-cbe----B-:0:0:1:53:0:0:1:0:10
Blue to play 53

1.Rollout124/16eq: +0.420
Player:
Opponent:
60.57% (G:18.67% B:1.30%)
39.43% (G:11.38% B:0.49%)
Conf.: 0.008 (+0.413...+0.428) - [100.0%]
Duration: 17 minutes 18 seconds
2.Rollout18/3 6/3eq: +0.378 (-0.043)
Player:
Opponent:
58.39% (G:21.40% B:1.68%)
41.61% (G:12.29% B:0.69%)
Conf.: 0.008 (+0.369...+0.386) - [0.0%]
Duration: 13 minutes 40 seconds
1 5184 Games rolled with Variance Reduction.
Dice Seed: 85746520
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

If we have less timing, then running with one back checker is mandatory as we cannot outwait white in the back.





White is Player 2

score: 0
pip: 148
Unlimited Game
Jacoby
pip: 140
score: 0

Blue is Player 1
XGID=-b--B-DBC--B--ba-cbe----B-:0:0:1:53:0:0:1:0:10
Blue to play 53

1.Rollout124/16eq: +0.546
Player:
Opponent:
62.88% (G:19.70% B:1.55%)
37.12% (G:10.35% B:0.45%)
Conf.: 0.019 (+0.526...+0.565) - [100.0%]
Duration: 3 minutes 44 seconds
2.Rollout18/3 6/3eq: +0.402 (-0.143)
Player:
Opponent:
59.14% (G:20.30% B:1.75%)
40.86% (G:11.54% B:0.60%)
Conf.: 0.018 (+0.384...+0.421) - [0.0%]
Duration: 2 minutes 55 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 85746520
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

Also, giving white a 4-prime makes running mandatory.





White is Player 2

score: 0
pip: 144
Unlimited Game
Jacoby
pip: 146
score: 0

Blue is Player 1
XGID=-b--B-CBD----Bba-bbdb---B-:0:0:1:53:0:0:1:0:10
Blue to play 53

1.Rollout124/16eq: -0.061
Player:
Opponent:
49.90% (G:13.98% B:0.97%)
50.10% (G:18.22% B:0.74%)
Conf.: 0.014 (-0.075...-0.047) - [100.0%]
Duration: 4 minutes 31 seconds
2.Rollout18/3 6/3eq: -0.148 (-0.087)
Player:
Opponent:
46.35% (G:15.50% B:0.96%)
53.65% (G:16.40% B:1.05%)
Conf.: 0.017 (-0.165...-0.131) - [0.0%]
Duration: 3 minutes 45 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 54317634
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

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