Yes.. the duplication of ones was very important in the original position. The best play in the variation below duplicates 2's, as Mick predicted. Strangely enough, I probably would have got this play in the changed position right otb.
          
 
         
 | | White is Player 2
score: 0
pip: 115 | | 1 point match | pip: 139
score: 0
Blue is Player 1 |
|
| XGID=-b--BBC-D----B--b-bbbAcbA-:0:0:1:51:0:0:0:1:10 |
| Blue to play 51 |
| 1. | XG Roller+ | 8/3 6/5 | eq: -0.129 |
| Player:
Opponent: | 43.57% (G:13.09% B:0.97%)
56.43% (G:36.41% B:1.96%) | |
|
| 2. | XG Roller+ | 13/8 6/5 | eq: -0.155 (-0.027) |
| Player:
Opponent: | 42.25% (G:12.82% B:0.98%)
57.75% (G:34.92% B:1.53%) | |
|
| 3. | XG Roller+ | 8/2 | eq: -0.167 (-0.038) |
| Player:
Opponent: | 41.65% (G:12.53% B:0.92%)
58.35% (G:37.22% B:1.74%) | |
|
| 4. | XG Roller+ | 13/12 13/8 | eq: -0.178 (-0.049) |
| Player:
Opponent: | 41.10% (G:12.13% B:0.86%)
58.90% (G:32.75% B:1.43%) | |
|
eXtreme Gammon Version: 2.10, MET: Kazaross XG2