1. | Rollout1 | 2/Off(2) | eq: +2.858 |
| Player: Opponent: | 100.00% (G:100.00% B:85.79%) 0.00% (G:0.00% B:0.00%) | Conf.: ± 0.000 (+2.858...+2.858) - [99.9%] Duration: 0.2 second |
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2. | Rollout1 | 1/Off(4) | eq: +2.857 (-0.001) |
| Player: Opponent: | 99.65% (G:95.64% B:90.86%) 0.35% (G:0.00% B:0.00%) | Conf.: ± 0.000 (+2.857...+2.858) - [0.1%] Duration: 1 minute 29 seconds |
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1 5184 Games rolled with Variance Reduction. Dice Seed: 57611092 Moves and cube decisions: 4-ply Search interval: Large
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1. | Rollout1 | 1/Off(4) | eq: +2.8580 |
| Player: Opponent: | 99.67% (G:95.67% B:90.87%) 0.33% (G:0.00% B:0.00%) | Conf.: ±0.0001 (+2.8579...+2.8581) - [97.7%] Duration: 26 minutes 09 seconds |
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2. | Rollout1 | 2/Off(2) | eq: +2.8579 (-0.0001) |
| Player: Opponent: | 100.00% (G:100.00% B:85.79%) 0.00% (G:0.00% B:0.00%) | Conf.: ±0.0000 (+2.8579...+2.8579) - [2.3%] Duration: 1.0 second |
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1 103680 Games rolled with Variance Reduction. Dice Seed: 57611092 Moves and cube decisions: 4-ply Search interval: Large
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In the original position, shown in the first (or left-hand) rollout diagram above, Bob correctly chose 2/off(2), though it's only right by a hair.
In the second (or right-hand) position above, White's 4pt spare has been moved to her 2pt. This slight change is enough (according to the rollout) to barely alter Blue's best play, which is now 1/off(4).
A different way to alter the original position is shown in the first (or left-hand) position below. White's 22pt checker has been advanced 1 pip to her 21pt. This gives her a better chance to get off the backgammon (due to double 3s), and more clearly switches Blue's best play to 1/off(4).
In the second (right-hand) position below (a) White's 22pt checker is again advanced to her 21pt. On the other hand, (b) her board is now closed. Factor (a) has a bigger impact than factor (b), so the switch to 1/off(4) still holds.
Nack
1. | Rollout1 | 1/Off(4) | eq: +2.852 |
| Player: Opponent: | 99.66% (G:95.65% B:90.35%) 0.34% (G:0.00% B:0.00%) | Conf.: ± 0.000 (+2.852...+2.853) - [100.0%] Duration: 1 minute 16 seconds |
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2. | Rollout1 | 2/Off(2) | eq: +2.839 (-0.014) |
| Player: Opponent: | 100.00% (G:100.00% B:83.86%) 0.00% (G:0.00% B:0.00%) | Conf.: ± 0.000 (+2.839...+2.839) - [0.0%] Duration: 0.2 second |
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1 5184 Games rolled with Variance Reduction. Dice Seed: 57611092 Moves and cube decisions: 4-ply Search interval: Large
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1. | Rollout1 | 1/Off(4) | eq: +2.846 |
| Player: Opponent: | 99.61% (G:95.27% B:90.21%) 0.39% (G:0.00% B:0.00%) | Conf.: ± 0.000 (+2.846...+2.847) - [100.0%] Duration: 28.3 seconds |
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2. | Rollout1 | 2/Off(2) | eq: +2.839 (-0.008) |
| Player: Opponent: | 100.00% (G:100.00% B:83.86%) 0.00% (G:0.00% B:0.00%) | Conf.: ± 0.000 (+2.839...+2.839) - [0.0%] Duration: 0.2 second |
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1 5184 Games rolled with Variance Reduction. Dice Seed: 57611092 Moves and cube decisions: 4-ply Search interval: Large
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