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Mid Game 53 - Four different best plays (Rollouts)

Posted By: Nack Ballard
Date: Thursday, 14 September 2023, at 9:56 p.m.

In Response To: Mid Game 53 Rollout (Colin Owen)





White is Player 2

score: 0
pip: 151
Unlimited Game
Jacoby Beaver
pip: 133
score: 0

Blue is Player 1
XGID=--bBBBCA--A-cB-a-b-eb---B-:1:-1:1:53:0:0:3:0:10
Main Position

1.Rollout124/16eq: -0.019
Player:
Opponent:
55.28% (G:19.38% B:1.06%)
44.72% (G:14.17% B:0.98%)
Conf.: ± 0.006 (-0.025...-0.014) - [100.0%]
Duration: 1 hour 26 minutes
2.Rollout110/7 6/1eq: -0.059 (-0.039)
Player:
Opponent:
53.60% (G:18.37% B:1.01%)
46.40% (G:13.72% B:0.72%)
Conf.: ± 0.006 (-0.064...-0.053) - [0.0%]
Duration: 1 hour 19 minutes
3.Rollout124/21 10/5eq: -0.076 (-0.057)
Player:
Opponent:
52.18% (G:21.23% B:1.38%)
47.82% (G:14.53% B:0.77%)
Conf.: ± 0.006 (-0.082...-0.070) - [0.0%]
Duration: 1 hour 29 minutes
4.Rollout213/8 10/7eq: -0.105 (-0.086)
Player:
Opponent:
52.01% (G:17.94% B:0.97%)
47.99% (G:13.91% B:0.88%)
Conf.: ± 0.007 (-0.113...-0.098) - [0.0%]
Duration: 45 minutes 44 seconds
1 5184 Games rolled with Variance Reduction.
Dice Seed: 48528842
Moves: 3-ply, cube decisions: XG Roller

2 2592 Games rolled with Variance Reduction.
Dice Seed: 48528842
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

The position above is the same as Colin's original position, except White owns her 5pt. The same play wins the rollout.

Keying off the position above and making only one change, I offer the three variants below.

Variant 1: White has her 3pt (instead of her 5pt).
Variant 2: White has her 2pt (instead of her 5pt).
Variant 3: White's 10pt checker is nudged back to her 11pt.

The best play (by rollout) is different in all four closely related positions.

Nack





White is Player 2

score: 0
pip: 147
Unlimited Game
Jacoby Beaver
pip: 133
score: 0

Blue is Player 1
XGID=--bBBBCA--A-cB-a-b-e--b-B-:1:-1:1:53:0:0:3:0:10
White owns her 3pt

1.Rollout110/7 6/1eq: +0.145
Player:
Opponent:
60.30% (G:19.42% B:1.08%)
39.70% (G:11.35% B:0.58%)
Conf.: ± 0.004 (+0.141...+0.148) - [93.5%]
Duration: 2 hours 13 minutes
2.Rollout113/8 10/7eq: +0.141 (-0.004)
Player:
Opponent:
59.71% (G:20.92% B:1.13%)
40.29% (G:11.16% B:0.73%)
Conf.: ± 0.004 (+0.137...+0.144) - [6.5%]
Duration: 2 hours 17 minutes
3.Rollout124/16eq: +0.132 (-0.012)
Player:
Opponent:
60.21% (G:20.85% B:1.16%)
39.79% (G:13.05% B:0.95%)
Conf.: ± 0.004 (+0.128...+0.136) - [0.0%]
Duration: 2 hours 28 minutes
4.Rollout224/21 10/5eq: +0.102 (-0.042)
Player:
Opponent:
58.00% (G:23.08% B:1.53%)
42.00% (G:13.17% B:0.61%)
Conf.: ± 0.005 (+0.097...+0.107) - [0.0%]
Duration: 40 minutes 46 seconds
1 10368 Games rolled with Variance Reduction.
Dice Seed: 25409525
Moves: 3-ply, cube decisions: XG Roller

2 5184 Games rolled with Variance Reduction.
Dice Seed: 25409525
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10





White is Player 2

score: 0
pip: 145
Unlimited Game
Jacoby Beaver
pip: 133
score: 0

Blue is Player 1
XGID=--bBBBCA--A-cB-a-b-e---bB-:1:-1:1:53:0:0:3:0:10
White owns her 2pt

1.Rollout113/8 10/7eq: +0.244
Player:
Opponent:
63.30% (G:21.76% B:1.17%)
36.70% (G:9.94% B:0.67%)
Conf.: ± 0.005 (+0.239...+0.249) - [100.0%]
Duration: 54 minutes 20 seconds
2.Rollout124/16eq: +0.222 (-0.021)
Player:
Opponent:
62.74% (G:22.83% B:1.39%)
37.26% (G:12.63% B:0.96%)
Conf.: ± 0.005 (+0.218...+0.227) - [0.0%]
Duration: 59 minutes 04 seconds
3.Rollout110/7 6/1eq: +0.219 (-0.025)
Player:
Opponent:
62.68% (G:20.01% B:1.06%)
37.32% (G:10.24% B:0.48%)
Conf.: ± 0.005 (+0.214...+0.224) - [0.0%]
Duration: 51 minutes 54 seconds
4.Rollout124/21 10/5eq: +0.210 (-0.034)
Player:
Opponent:
61.14% (G:24.38% B:1.62%)
38.86% (G:11.82% B:0.51%)
Conf.: ± 0.005 (+0.205...+0.214) - [0.0%]
Duration: 1 hour 19 minutes
1 5184 Games rolled with Variance Reduction.
Dice Seed: 37710502
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10





White is Player 2

score: 0
pip: 152
Unlimited Game
Jacoby Beaver
pip: 133
score: 0

Blue is Player 1
XGID=--bBBBCA--A-cBa--b-eb---B-:1:-1:1:53:0:0:3:0:10
White's blot is on her 11pt

1.Rollout124/21 10/5eq: +0.004
Player:
Opponent:
54.58% (G:21.54% B:1.21%)
45.42% (G:12.46% B:0.62%)
Conf.: ± 0.005 (-0.001...+0.010) - [100.0%]
Duration: 1 hour 22 minutes
2.Rollout110/7 6/1eq: -0.033 (-0.037)
Player:
Opponent:
54.69% (G:17.74% B:0.94%)
45.31% (G:13.01% B:0.70%)
Conf.: ± 0.005 (-0.038...-0.028) - [0.0%]
Duration: 1 hour 00 minute
3.Rollout124/16eq: -0.037 (-0.041)
Player:
Opponent:
54.43% (G:19.72% B:1.13%)
45.57% (G:14.64% B:1.03%)
Conf.: ± 0.006 (-0.043...-0.030) - [0.0%]
Duration: 1 hour 23 minutes
4.Rollout213/8 10/7eq: -0.099 (-0.103)
Player:
Opponent:
52.01% (G:18.64% B:0.99%)
47.99% (G:13.66% B:0.87%)
Conf.: ± 0.008 (-0.107...-0.091) - [0.0%]
Duration: 27 minutes 01 second
1 5184 Games rolled with Variance Reduction.
Dice Seed: 77069922
Moves: 3-ply, cube decisions: XG Roller

2 2592 Games rolled with Variance Reduction.
Dice Seed: 77069922
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10

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