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Advanced Backgammon #95 — 3 More Variants

Posted By: Igor
Date: Sunday, 27 April 2014, at 4:35 p.m.

In Response To: Advanced Backgammon #95 — 3 More Variants (Taper_Mike)

Thanks, Mike, for good variants. Here are the rollouts.





White is Player 2

score: 0
pip: 167
Unlimited Game
Jacoby Beaver
pip: 145
score: 0

Blue is Player 1
XGID=aBaB--C-A--AeD---c-e----B-:0:0:1:00:0:0:3:0:10
Blue on roll, cube action?

Analyzed in Rollout No double Double/Take
Player Winning Chances: 63.04% (G:32.75% B:0.60%) 63.32% (G:34.28% B:0.56%)
Opponent Winning Chances: 36.96% (G:8.64% B:0.41%) 36.68% (G:8.98% B:0.47%)
Cubeless Equities +0.504 +1.040
Cubeful Equities
No double:+0.662 (-0.092)±0.009 (+0.652..+0.671)
Double/Take:+0.753±0.014 (+0.740..+0.767)
Double/Pass:+1.000 (+0.247)
Best Cube action: Double / Take
Rollout details
2592 Games rolled with Variance Reduction.
Dice Seed: 9595161
Moves: 3-ply, cube decisions: XG Roller
Double Decision confidence:100.0%
Take Decision confidence:100.0%
Duration: 13 minutes 56 seconds

eXtreme Gammon Version: 2.10
White is Player 2

score: 0
pip: 165
Unlimited Game
Jacoby Beaver
pip: 145
score: 0

Blue is Player 1
XGID=aB-Ba-C-A--AeD---c-e----B-:0:0:1:00:0:0:3:0:10
Blue on roll, cube action?

Analyzed in Rollout No double Double/Take
Player Winning Chances: 63.92% (G:33.88% B:0.55%) 64.29% (G:35.99% B:0.54%)
Opponent Winning Chances: 36.08% (G:8.15% B:0.42%) 35.71% (G:8.50% B:0.49%)
Cubeless Equities +0.537 +1.123
Cubeful Equities
No double:+0.660 (-0.174)±0.010 (+0.650..+0.669)
Double/Take:+0.834±0.015 (+0.819..+0.849)
Double/Pass:+1.000 (+0.166)
Best Cube action: Double / Take
Rollout details
2592 Games rolled with Variance Reduction.
Dice Seed: 34841930
Moves: 3-ply, cube decisions: XG Roller
Double Decision confidence:100.0%
Take Decision confidence:100.0%
Duration: 12 minutes 15 seconds

eXtreme Gammon Version: 2.10
White is Player 2

score: 0
pip: 164
Unlimited Game
Jacoby Beaver
pip: 145
score: 0

Blue is Player 1
XGID=aB-B-aC-A--AeD---c-e----B-:0:0:1:00:0:0:3:0:10
Blue on roll, cube action?

Analyzed in Rollout No double Double/Take
Player Winning Chances: 66.32% (G:38.44% B:0.55%) 66.60% (G:40.79% B:0.60%)
Opponent Winning Chances: 33.68% (G:7.39% B:0.37%) 33.40% (G:7.84% B:0.40%)
Cubeless Equities +0.639 +1.327
Cubeful Equities
No double:+0.735 (-0.265)±0.007 (+0.728..+0.742)
Double/Take:+1.058 (+0.058)±0.013 (+1.045..+1.071)
Double/Pass:+1.000
Best Cube action: Double / Pass
Rollout details
2592 Games rolled with Variance Reduction.
Dice Seed: 25201838
Moves: 3-ply, cube decisions: XG Roller
Double Decision confidence:100.0%
Take Decision confidence:100.0%
Duration: 10 minutes 49 seconds

eXtreme Gammon Version: 2.10

Now, let's add the 10th checker in the zone.





White is Player 2

score: 0
pip: 167
Unlimited Game
Jacoby Beaver
pip: 143
score: 0

Blue is Player 1
XGID=aBaB--C-A--BeC---c-e----B-:0:0:1:00:0:0:3:0:10
Blue on roll, cube action?

Analyzed in Rollout No double Double/Take
Player Winning Chances: 65.00% (G:35.27% B:0.63%) 65.31% (G:37.17% B:0.55%)
Opponent Winning Chances: 35.00% (G:8.07% B:0.40%) 34.69% (G:8.31% B:0.47%)
Cubeless Equities +0.574 +1.191
Cubeful Equities
No double:+0.713 (-0.201)±0.014 (+0.699..+0.727)
Double/Take:+0.914±0.021 (+0.893..+0.935)
Double/Pass:+1.000 (+0.086)
Best Cube action: Double / Take
Rollout details
1296 Games rolled with Variance Reduction.
Dice Seed: 25201838
Moves: 3-ply, cube decisions: XG Roller
Double Decision confidence:100.0%
Take Decision confidence:100.0%
Duration: 6 minutes 17 seconds

eXtreme Gammon Version: 2.10
White is Player 2

score: 0
pip: 165
Unlimited Game
Jacoby Beaver
pip: 143
score: 0

Blue is Player 1
XGID=aB-Ba-C-A--BeC---c-e----B-:0:0:1:00:0:0:3:0:10
Blue on roll, cube action?

Analyzed in Rollout No double Double/Take
Player Winning Chances: 65.72% (G:36.07% B:0.56%) 66.25% (G:38.85% B:0.55%)
Opponent Winning Chances: 34.28% (G:7.66% B:0.37%) 33.75% (G:7.95% B:0.42%)
Cubeless Equities +0.600 +1.271
Cubeful Equities
No double:+0.721 (-0.279)±0.002 (+0.719..+0.723)
Double/Take:+1.001 (+0.001)±0.003 (+0.998..+1.004)
Double/Pass:+1.000
Best Cube action: Double / Pass
Rollout details
46656 Games rolled with Variance Reduction.
Dice Seed: 25201838
Moves: 3-ply, cube decisions: XG Roller
Double Decision confidence:100.0%
Take Decision confidence:76.0%
Duration: 3 hours 38 minutes

eXtreme Gammon Version: 2.10

The last position is a good reference position, I believe.

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