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MABC Study #13 - Variants and ROLLOUTS

Posted By: Nack Ballard
Date: Monday, 25 December 2023, at 5:24 p.m.

In Response To: MABC Study #13 Rollout (Jason Lee)





White is Player 2

score: 0
pip: 160
3 point match
pip: 155
score: 0

Blue is Player 1
XGID=abaA-BDB----bC---A-d-abbB-:1:-1:1:65:0:0:0:3:10
Blue to play 65

1.Rollout117/6eq: +0.224
Player:
Opponent:
60.95% (G:26.21% B:8.61%)
39.05% (G:15.11% B:3.31%)
Conf.: ± 0.003 (+0.220...+0.227) - [91.0%]
Duration: 5 hours 10 minutes
2.Rollout113/2* eq: +0.220 (-0.003)
Player:
Opponent:
60.66% (G:27.76% B:11.01%)
39.34% (G:17.86% B:7.31%)
Conf.: ± 0.004 (+0.217...+0.224) - [9.0%]
Duration: 6 hours 16 minutes
3.Rollout224/13eq: +0.183 (-0.040)
Player:
Opponent:
60.57% (G:24.67% B:8.08%)
39.43% (G:18.07% B:2.90%)
Conf.: ± 0.008 (+0.175...+0.191) - [0.0%]
Duration: 59 minutes 02 seconds
1 7776 Games rolled with Variance Reduction.
Moves: 4-ply, cube decisions: XG Roller+
Search interval: Huge

2 1296 Games rolled with Variance Reduction.
Moves: 4-ply, cube decisions: XG Roller+
Search interval: Huge

eXtreme Gammon Version: 2.19.211.pre-release, MET: Kazaross XG2

Jason's rollout of the original position is above. T (sTack, 17/6) and H (Hit, 13/2*) are "tied."

My rollouts of three contrasting variants below produce three different best plays. In each case, only a single adjustment has been made to Jason's original position (above).

Nack





White is Player 2

score: 0
pip: 160
3 point match
pip: 153
score: 0

Blue is Player 1
XGID=abaAB-DB----bC---A-d-abbB-:1:-1:1:65:0:0:0:3:10
Variant 1: Black has his 4pt instead of his 5pt

1.Rollout113/2* eq: +0.130
Player:
Opponent:
57.58% (G:26.59% B:11.00%)
42.42% (G:19.46% B:7.30%)
Conf.: ± 0.011 (+0.119...+0.142) - [100.0%]
Duration: 44 minutes 28 seconds
2.Rollout117/6eq: +0.097 (-0.033)
Player:
Opponent:
57.14% (G:23.63% B:7.68%)
42.86% (G:16.37% B:3.76%)
Conf.: ± 0.010 (+0.088...+0.107) - [0.0%]
Duration: 41 minutes 49 seconds
3.Rollout117/11 7/2* eq: +0.076 (-0.055)
Player:
Opponent:
56.18% (G:25.84% B:11.35%)
43.82% (G:21.66% B:10.00%)
Conf.: ± 0.011 (+0.064...+0.087) - [0.0%]
Duration: 48 minutes 44 seconds
4.Rollout124/13eq: +0.065 (-0.065)
Player:
Opponent:
56.81% (G:22.20% B:7.12%)
43.19% (G:19.58% B:2.90%)
Conf.: ± 0.010 (+0.055...+0.075) - [0.0%]
Duration: 44 minutes 01 second
1 1296 Games rolled with Variance Reduction.
Dice Seed: 40548372
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10, MET: Kazaross XG2





White is Player 2

score: 0
pip: 166
3 point match
pip: 155
score: 0

Blue is Player 1
XGID=abaA-BDB----bC---A-dbab-B-:1:-1:1:65:0:0:0:3:10
Variant 2: White has her 5pt instead of her 2pt

1.Rollout124/13eq: -0.002
Player:
Opponent:
54.59% (G:21.68% B:6.84%)
45.41% (G:20.81% B:4.03%)
Conf.: ± 0.012 (-0.014...+0.009) - [100.0%]
Duration: 39 minutes 39 seconds
2.Rollout113/2* eq: -0.031 (-0.029)
Player:
Opponent:
52.74% (G:23.91% B:10.41%)
47.26% (G:21.87% B:8.99%)
Conf.: ± 0.013 (-0.044...-0.018) - [0.0%]
Duration: 41 minutes 34 seconds
3.Rollout117/6eq: -0.052 (-0.050)
Player:
Opponent:
52.34% (G:22.86% B:8.17%)
47.66% (G:20.04% B:5.11%)
Conf.: ± 0.012 (-0.064...-0.040) - [0.0%]
Duration: 36 minutes 56 seconds
1 1296 Games rolled with Variance Reduction.
Dice Seed: 97111050
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10, MET: Kazaross XG2





White is Player 2

score: 0
pip: 164
3 point match
pip: 155
score: 0

Blue is Player 1
XGID=abaA-BDB----bC---A-dba-bB-:1:-1:1:65:0:0:0:3:10
Variant 2: White has her 5pt instead of her 3pt

1.Rollout117/6eq: +0.096
Player:
Opponent:
56.87% (G:24.76% B:8.30%)
43.13% (G:17.36% B:3.74%)
Conf.: ± 0.008 (+0.089...+0.104) - [99.3%]
Duration: 1 hour 06 minutes
2.Rollout113/2* eq: +0.082 (-0.015)
Player:
Opponent:
56.32% (G:25.68% B:11.62%)
43.68% (G:20.63% B:8.34%)
Conf.: ± 0.008 (+0.074...+0.090) - [0.5%]
Duration: 1 hour 18 minutes
3.Rollout124/13eq: +0.080 (-0.016)
Player:
Opponent:
57.27% (G:22.71% B:7.47%)
42.73% (G:19.66% B:2.94%)
Conf.: ± 0.008 (+0.072...+0.088) - [0.1%]
Duration: 1 hour 11 minutes
1 2592 Games rolled with Variance Reduction.
Dice Seed: 52998702
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10, MET: Kazaross XG2

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