Making the 5pt is best in all three positions:
42P-66B-31 [P $7 E10] "<=10
53P-66B-31 [P E2 $10] "<=10
64P-66B-31 [P E9 $36] "<=10*5
Rollout details are below.

              
 
              
 | | White is Player 2
score: 0 pip: 143 | Unlimited Game Jacoby Beaver | pip: 161 score: 0
Blue is Player 1 | |
| XGID=----B-DbB---cE---cbe----B-:0:0:1:13:0:0:3:0:10 |
| 42P-66B-31 |
| 1. | Rollout1 | 8/5 6/5 | eq: -0.468 |
| Player: Opponent: | 38.27% (G:9.24% B:0.31%) 61.73% (G:14.89% B:0.62%) | Conf.: ± 0.005 (-0.473...-0.462) - [97.1%] Duration: 6 hours 46 minutes |
|
| 2. | Rollout1 | 13/10 6/5 | eq: -0.475 (-0.007) |
| Player: Opponent: | 38.39% (G:9.01% B:0.32%) 61.61% (G:15.79% B:0.76%) | Conf.: ± 0.005 (-0.480...-0.469) - [2.8%] Duration: 7 hours 01 minute |
|
| 3. | Rollout1 | 24/21 6/5 | eq: -0.478 (-0.010) |
| Player: Opponent: | 38.65% (G:8.16% B:0.31%) 61.35% (G:16.06% B:0.59%) | Conf.: ± 0.005 (-0.483...-0.473) - [0.2%] Duration: 7 hours 01 minute |
|
| |
1 10368 Games rolled with Variance Reduction. Dice Seed: 27596186 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.01

              
 
              
 | | White is Player 2
score: 0 pip: 143 | Unlimited Game Jacoby Beaver | pip: 159 score: 0
Blue is Player 1 | |
| XGID=---B--DbB---cE---cbe----B-:0:0:1:31:0:0:3:0:10 |
| 53P-66B-31 |
| 1. | Rollout1 | 8/5 6/5 | eq: -0.503 |
| Player: Opponent: | 37.45% (G:9.09% B:0.30%) 62.55% (G:15.22% B:0.68%) | Conf.: ± 0.005 (-0.508...-0.498) - [74.1%] Duration: 3 hours 32 minutes |
|
| 2. | Rollout1 | 24/21 6/5 | eq: -0.505 (-0.002) |
| Player: Opponent: | 37.90% (G:8.11% B:0.30%) 62.10% (G:16.68% B:0.63%) | Conf.: ± 0.005 (-0.510...-0.500) - [25.7%] Duration: 3 hours 34 minutes |
|
| 3. | Rollout1 | 13/10 6/5 | eq: -0.513 (-0.010) |
| Player: Opponent: | 37.36% (G:9.08% B:0.31%) 62.64% (G:15.88% B:0.82%) | Conf.: ± 0.006 (-0.519...-0.507) - [0.1%] Duration: 3 hours 22 minutes |
|
| |
1 10368 Games rolled with Variance Reduction. Dice Seed: 93387039 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.01

              
 
              
 | | White is Player 2
score: 0 pip: 143 | Unlimited Game Jacoby Beaver | pip: 157 score: 0
Blue is Player 1 | |
| XGID=--B---DbB---cE---cbe----B-:0:0:1:13:0:0:3:0:10 |
| 64P-66B-31 |
| 1. | Rollout1 | 8/5 6/5 | eq: -0.555 |
| Player: Opponent: | 36.11% (G:8.85% B:0.26%) 63.89% (G:15.74% B:0.69%) | Conf.: ± 0.005 (-0.560...-0.550) - [99.4%] Duration: 8 hours 05 minutes |
|
| 2. | Rollout1 | 24/21 6/5 | eq: -0.563 (-0.009) |
| Player: Opponent: | 36.49% (G:7.76% B:0.26%) 63.51% (G:17.64% B:0.68%) | Conf.: ± 0.005 (-0.568...-0.559) - [0.6%] Duration: 7 hours 39 minutes |
|
| 3. | Rollout2 | 13/10 6/5 | eq: -0.590 (-0.036) |
| Player: Opponent: | 35.63% (G:8.73% B:0.28%) 64.37% (G:16.82% B:0.88%) | Conf.: ± 0.007 (-0.598...-0.583) - [0.0%] Duration: 3 hours 15 minutes |
|
| |
1 10368 Games rolled with Variance Reduction. Dice Seed: 70051565 Moves: 3-ply, cube decisions: XG Roller
2 5184 Games rolled with Variance Reduction. Dice Seed: 70051565 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.01
Contrast the above three positions with the similar 62S-53P-33E-31, where P is an error of .045.
Nack