Recently I studied 21$-MISS-66 variations and found that most of the time 24/18 13/7(2) 11/5 is correct.
I found two exceptions and this is one of them.
         
 
         
 | | White is Player 2
score: 0
pip: 164 | Money session
Jacoby Beaver | pip: 164
score: 0
Blue is Player 1 |
|
| XGID=-b---AD-C--AdDa--c-da---B-:0:0:1:66:0:0:3:0:10 |
| Blue to play 66 |
| 1. | XG Roller+ | 24/18(2) 13/7 11/5 | eq: +0.625 |
| Player:
Opponent: | 64.21% (G:19.10% B:1.08%)
35.79% (G:7.51% B:0.27%) | |
|
| 2. | XG Roller+ | 24/18 13/7(2) 11/5 | eq: +0.543 (-0.082) |
| Player:
Opponent: | 62.31% (G:20.37% B:1.51%)
37.69% (G:10.01% B:0.37%) | |
|
| 3. | XG Roller+ | 24/18(2) 13/7(2) | eq: +0.513 (-0.112) |
| Player:
Opponent: | 62.09% (G:16.60% B:0.78%)
37.91% (G:8.44% B:0.31%) | |
|
eXtreme Gammon Version: 1.21
This is understandable, because you would give him 21(!) hit and cover by playing routinly (24/18 13/7(2) 11/5). Also 6 is really duped with correct play.
However, two positions shown below confuse me.
 
| | White is Player 2
score: 0
pip: 162 | Money session
Jacoby Beaver | pip: 164
score: 0
Blue is Player 1 |
|
| XGID=-a--aAD-C--AdDa--c-e----B-:0:0:1:66:0:0:3:0:10 |
| Blue to play 66 |
| 1. | XG Roller+ | 24/18(2) 13/7 11/5 | eq: +0.519 |
| Player:
Opponent: | 62.14% (G:17.84% B:0.74%)
37.86% (G:7.26% B:0.26%) | |
|
| 2. | XG Roller+ | 24/18 13/7(2) 11/5 | eq: +0.512 (-0.007) |
| Player:
Opponent: | 62.31% (G:17.71% B:0.94%)
37.69% (G:8.31% B:0.31%) | |
|
| 3. | XG Roller+ | 24/18(2) 11/5 8/2 | eq: +0.406 (-0.113) |
| Player:
Opponent: | 60.23% (G:16.03% B:0.60%)
39.77% (G:8.04% B:0.31%) | |
|
eXtreme Gammon Version: 1.21
| | White is Player 2
score: 0
pip: 162 | Money session
Jacoby Beaver | pip: 164
score: 0
Blue is Player 1 |
|
| XGID=-b---AD-C--AcDaa-c-e----B-:0:0:1:66:0:0:3:0:10 |
| Blue to play 66 |
| 1. | XG Roller+ | 24/18 13/7(2) 11/5 | eq: +0.740 |
| Player:
Opponent: | 66.39% (G:22.29% B:1.78%)
33.61% (G:8.80% B:0.29%) | |
|
| 2. | XG Roller+ | 24/18(2) 13/7 11/5 | eq: +0.715 (-0.025) |
| Player:
Opponent: | 66.14% (G:19.21% B:1.19%)
33.86% (G:7.04% B:0.26%) | |
|
| 3. | XG Roller+ | 24/18(2) 13/7(2) | eq: +0.573 (-0.167) |
| Player:
Opponent: | 63.33% (G:17.27% B:0.91%)
36.67% (G:8.79% B:0.36%) | |
|
eXtreme Gammon Version: 1.21
Why 21$-32S-66 is correct to play 24/18(2) 13/7 11/5 while not in 21$-32D-66? I wouldn't like to expose myself on quadruple shot! I have done a light rollout but the order wasn't overturned.
I would really appreciate your precious opinion.