| |
BGonline.org Forums
PotD 04-25-26 - Variants
Posted By: Nack Ballard In Response To: Position of the Day 04-25-26 - Rollout (Stick)
Date: Tuesday, 28 April 2026, at 9:51 p.m.
White is Player 2
score: 0
pip: 206Unlimited Game
Jacoby Beaverpip: 138
score: 0
Blue is Player 1XGID=aAca--D-CB-AdC---b-bbA----:0:0:1:00:0:0:3:0:10 Original position
Analyzed in Rollout No double Double/Take Player Winning Chances: 56.79% (G:30.57% B:1.91%) 56.70% (G:30.41% B:1.89%) Opponent Winning Chances: 43.21% (G:8.86% B:0.47%) 43.30% (G:9.06% B:0.48%) Cubeless Equities +0.367 +0.723 Cubeful Equities No double: +0.482 ±0.023 (+0.459..+0.504) Double/Take: +0.351 (-0.130) ±0.027 (+0.324..+0.379) Double/Pass: +1.000 (+0.518) Best Cube action: No double / Take Percentage of wrong pass needed to make the double decision right: 16.7% Rollout details 1296 Games rolled with Variance Reduction.
Moves: 3-ply, cube decisions: XG RollerDouble Decision confidence: 100.0% Take Decision confidence: 100.0% Duration: 2 minutes 37 seconds
Above is Stick's rollout of the original position.
Below are two cusp variants, each based on a single change.
The third variant extricates Blue's lone back checker around and covers his 11pt. It may seem surprising that this change has a significantly smaller impact than each of the first two.
Nack
White is Player 2
score: 0
pip: 208Unlimited Game
Jacoby Beaverpip: 138
score: 0
Blue is Player 1XGID=aAca--D-CB-AdC---b-d-A----:0:0:1:00:0:0:3:0:10 Variant 1: The White 5pt checkers are on his 6pt
Analyzed in Rollout No double Double/Take Player Winning Chances: 61.49% (G:33.93% B:2.45%) 61.49% (G:34.17% B:2.46%) Opponent Winning Chances: 38.51% (G:6.97% B:0.32%) 38.51% (G:7.14% B:0.33%) Cubeless Equities +0.521 +1.042 Cubeful Equities No double: +0.705 (-0.004) ±0.012 (+0.694..+0.717) Double/Take: +0.710 ±0.014 (+0.696..+0.723) Double/Pass: +1.000 (+0.290) Best Cube action: Double / Take Rollout details 5184 Games rolled with Variance Reduction.
Dice Seed: 91642967
Moves: 3-ply, cube decisions: XG RollerDouble Decision confidence: 66.8% Take Decision confidence: 100.0% Duration: 3 hours 30 minutes
White is Player 2
score: 0
pip: 206Unlimited Game
Jacoby Beaverpip: 143
score: 0
Blue is Player 1XGID=a-ca--D-DB-BdB---b-bbA----:0:0:1:00:0:0:3:0:10 Variant 2: The Blue 1pt checker is on his 11pt
Analyzed in Rollout No double Double/Take Player Winning Chances: 61.67% (G:31.02% B:2.38%) 61.78% (G:31.48% B:2.51%) Opponent Winning Chances: 38.33% (G:6.71% B:0.30%) 38.22% (G:6.72% B:0.30%) Cubeless Equities +0.497 +1.011 Cubeful Equities No double: +0.685 (-0.002) ±0.011 (+0.675..+0.696) Double/Take: +0.688 ±0.015 (+0.672..+0.703) Double/Pass: +1.000 (+0.312) Best Cube action: Double / Take Rollout details 5184 Games rolled with Variance Reduction.
Dice Seed: 40767767
Moves: 3-ply, cube decisions: XG RollerDouble Decision confidence: 60.2% Take Decision confidence: 100.0% Duration: 3 hours 16 minutes
White is Player 2
score: 0
pip: 206Unlimited Game
Jacoby Beaverpip: 128
score: 0
Blue is Player 1XGID=aAca--D-CB-BdC---b-bb-----:0:0:1:00:0:0:3:0:10 Variant 3: Blue's 21pt checker has covered his 11pt
Analyzed in Rollout No double Double/Take Player Winning Chances: 59.09% (G:33.43% B:2.24%) 59.10% (G:33.18% B:2.16%) Opponent Winning Chances: 40.91% (G:7.39% B:0.36%) 40.90% (G:7.51% B:0.35%) Cubeless Equities +0.461 +0.914 Cubeful Equities No double: +0.602 ±0.022 (+0.581..+0.624) Double/Take: +0.554 (-0.049) ±0.029 (+0.525..+0.582) Double/Pass: +1.000 (+0.398) Best Cube action: No double / Take Percentage of wrong pass needed to make the double decision right: 9.8% Rollout details 1296 Games rolled with Variance Reduction.
Dice Seed: 295289
Moves: 3-ply, cube decisions: XG RollerDouble Decision confidence: 99.6% Take Decision confidence: 100.0% Duration: 17 minutes 40 seconds
| |
BGonline.org Forums is maintained by Stick with WebBBS 5.12.