Robertie recommends 13/10 over 8/5 for all the obvious reasons; this is the play that I also would have chosen. But the rollout is in slight favor of 8/5.

              
 
              
 | | White is Player 2
score: 0 pip: 155 | Unlimited Game Jacoby | pip: 156 score: 0
Blue is Player 1 | |
XGID=-aa--BD-C---dD---c-d-bA-A-:0:0:1:32:0:0:1:0:10 |
Blue to play 32 |
1. | Rollout1 | 24/22 8/5 | eq: +0.174 |
| Player: Opponent: | 53.21% (G:16.57% B:0.50%) 46.79% (G:10.26% B:0.41%) | Conf.: ± 0.003 (+0.171...+0.178) - [100.0%] Duration: 1 hour 41 minutes |
|
2. | Rollout1 | 24/22 13/10 | eq: +0.161 (-0.014) |
| Player: Opponent: | 53.31% (G:15.69% B:0.51%) 46.69% (G:10.73% B:0.44%) | Conf.: ± 0.004 (+0.157...+0.164) - [0.0%] Duration: 1 hour 46 minutes |
|
|
1 20736 Games rolled with Variance Reduction. Dice Seed: 94782038 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.10
Can we make 13/10 come out on top? Sure, how about an added incentive to unstack the midpoint? (At the same time it also reduces the number of attackers in the zone for blue.)

              
 
              
 | | White is Player 2
score: 0 pip: 155 | Unlimited Game Jacoby | pip: 163 score: 0
Blue is Player 1 | |
XGID=-aa--BC-C---dE---c-d-bA-A-:0:0:1:32:0:0:1:0:10 |
Blue to play 32 |
1. | Rollout1 | 24/22 13/10 | eq: +0.133 |
| Player: Opponent: | 52.99% (G:13.93% B:0.50%) 47.01% (G:11.12% B:0.44%) | Conf.: ± 0.011 (+0.122...+0.144) - [100.0%] Duration: 16 minutes 07 seconds |
|
2. | Rollout1 | 24/22 8/5 | eq: +0.086 (-0.047) |
| Player: Opponent: | 51.36% (G:14.24% B:0.49%) 48.64% (G:10.91% B:0.45%) | Conf.: ± 0.010 (+0.076...+0.096) - [0.0%] Duration: 15 minutes 18 seconds |
|
|
1 2592 Games rolled with Variance Reduction. Dice Seed: 42093345 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.10
At DMP 13/10 is just a hair ahead.

              
 
              
 | | White is Player 2
score: 0 pip: 155 | 1 point match | pip: 156 score: 0
Blue is Player 1 | |
XGID=-aa--BD-C---dD---c-d-bA-A-:0:0:1:32:0:0:0:1:10 |
Blue to play 32 |
1. | Rollout1 | 24/22 13/10 | eq: +0.067 |
| Player: Opponent: | 53.37% (G:17.35% B:1.81%) 46.63% (G:13.19% B:1.30%) | Conf.: ± 0.002 (+0.066...+0.069) - [100.0%] Duration: 39 minutes 29 seconds |
|
2. | Rollout1 | 24/22 8/5 | eq: +0.063 (-0.004) |
| Player: Opponent: | 53.15% (G:17.89% B:1.57%) 46.85% (G:12.04% B:1.15%) | Conf.: ± 0.001 (+0.062...+0.064) - [0.0%] Duration: 36 minutes 09 seconds |
|
|
1 15552 Games rolled with Variance Reduction. Dice Seed: 94782038 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.10, MET: Kazaross XG2
Finally, GS and GG results:

              
 
              
 | | White is Player 2
score: 0 pip: 155 | 2 point match Crawford | pip: 156 score: 1
Blue is Player 1 | |
XGID=-aa--BD-C---dD---c-d-bA-A-:0:0:1:32:1:0:1:2:10 |
Blue to play 32 |
1. | Rollout1 | 24/22 8/5 | eq: -0.143 |
| Player: Opponent: | 52.71% (G:18.19% B:1.66%) 47.29% (G:9.84% B:0.87%) | Conf.: ± 0.002 (-0.144...-0.141) - [93.4%] Duration: 43 minutes 18 seconds |
|
2. | Rollout1 | 24/22 13/10 | eq: -0.144 (-0.002) |
| Player: Opponent: | 52.48% (G:17.13% B:1.79%) 47.52% (G:9.69% B:0.88%) | Conf.: ± 0.002 (-0.146...-0.143) - [6.6%] Duration: 45 minutes 01 second |
|
|
1 20736 Games rolled with Variance Reduction. Dice Seed: 94782038 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.10, MET: Kazaross XG2

              
 
              
 | | White is Player 2
score: 1 pip: 155 | 2 point match Crawford | pip: 156 score: 0
Blue is Player 1 | |
XGID=-aa--BD-C---dD---c-d-bA-A-:0:0:1:32:0:1:1:2:10 |
Blue to play 32 |
1. | Rollout1 | 24/22 8/5 | eq: +0.408 |
| Player: Opponent: | 53.57% (G:16.85% B:1.09%) 46.43% (G:12.35% B:1.30%) | Conf.: ± 0.003 (+0.406...+0.411) - [100.0%] Duration: 20 minutes 18 seconds |
|
2. | Rollout1 | 24/22 13/10 | eq: +0.402 (-0.007) |
| Player: Opponent: | 53.61% (G:16.47% B:1.14%) 46.39% (G:13.76% B:1.43%) | Conf.: ± 0.003 (+0.399...+0.404) - [0.0%] Duration: 21 minutes 25 seconds |
|
|
1 10368 Games rolled with Variance Reduction. Dice Seed: 94782038 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.10, MET: Kazaross XG2