This was a case of autopilot error. With the benefit of QF, one can more easily see that Blue wants to save a 6 here. But since this isn't your standard "save a 6" position, I breezed by this decision without much thought and played 13/5.
The choice between the natural 8/6 and the ugly 6/4 is more interesting. Perhaps someone with a better computer than I have will be interested in rolling this out. As for variants, I suspect that moving White's outfield blot around will be instructive.
         
 
       
 | | White is Player 2
score: 0
pip: 110 | | Unlimited Game | pip: 115
score: 0
Blue is Player 1 |
|
| XGID=--b-CBCBC----A-a--bbbbbbA-:0:0:1:62:0:0:0:0:10 |
| Blue to play 62 |
| 1. | XG Roller++ | 13/7 8/6 | eq: +0.390 |
| Player:
Opponent: | 59.58% (G:11.46% B:0.40%)
40.42% (G:6.28% B:0.19%) | |
|
| 2. | XG Roller++ | 13/7 6/4 | eq: +0.376 (-0.014) |
| Player:
Opponent: | 59.21% (G:11.04% B:0.38%)
40.79% (G:7.21% B:0.21%) | |
|
| 3. | XG Roller++ | 13/5 | eq: +0.283 (-0.107) |
| Player:
Opponent: | 57.44% (G:11.06% B:0.41%)
42.56% (G:7.09% B:0.22%) | |
|
eXtreme Gammon Version: 2.10