We'd certainly hit loose if we could keep our five-prime, so that should help us see the urgency of knocking White off the edge of our prime, even at the cost of weakening our prime somewhat.
At gammon save, the rollout below says the top two plays are tied.

              
 
              
 | | White is Player 2
score: 0 pip: 107 | | Unlimited Game | pip: 140 score: 0
Blue is Player 1 | |
| XGID=-A--aBBBBC-----bbb-cCc--b-:0:0:1:11:0:0:0:0:10 |
| Blue to play 11 |
| 1. | Rollout1 | 9/7 5/4*(2) | eq: -0.147 |
| Player: Opponent: | 46.00% (G:9.13% B:0.29%) 54.00% (G:12.73% B:0.26%) | Conf.: ± 0.012 (-0.159...-0.135) - [100.0%] Duration: 4 minutes 43 seconds |
|
| 2. | Rollout1 | 9/5 | eq: -0.234 (-0.087) |
| Player: Opponent: | 42.81% (G:7.78% B:0.23%) 57.19% (G:9.64% B:0.16%) | Conf.: ± 0.011 (-0.245...-0.223) - [0.0%] Duration: 3 minutes 42 seconds |
|
| |
1 1296 Games rolled with Variance Reduction. Dice Seed: 271828 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.19.211.pre-release
Gammon save:

              
 
              
 | | White is Player 2
score: 0 pip: 107 | 2 point match Crawford | pip: 140 score: 1
Blue is Player 1 | |
| XGID=-A--aBBBBC-----bbb-cCc--b-:0:0:1:11:1:0:1:2:10 |
| Blue to play 11 |
| 1. | Rollout1 | 9/7 5/4*(2) | eq: -0.293 |
| Player: Opponent: | 44.14% (G:6.41% B:0.32%) 55.86% (G:8.78% B:0.29%) | Conf.: ± 0.006 (-0.299...-0.287) - [93.6%] Duration: 3 minutes 05 seconds |
|
| 2. | Rollout1 | 9/5 | eq: -0.299 (-0.006) |
| Player: Opponent: | 41.66% (G:5.61% B:0.35%) 58.34% (G:6.61% B:0.24%) | Conf.: ± 0.005 (-0.304...-0.294) - [6.4%] Duration: 2 minutes 51 seconds |
|
| |
1 1296 Games rolled with Variance Reduction. Dice Seed: 52672062 Moves: 3-ply, cube decisions: XG Roller
|
eXtreme Gammon Version: 2.19.211.pre-release, MET: Kazaross XG2