        
 
         
 | | White is Player 2
score: 0
pip: 99 | | 5 point match | pip: 76
score: 0
Blue is Player 1 |
|
| XGID=-BBEaBB-----A-d----bbAbbb-:0:0:1:21:0:0:0:5:10 |
| Blue to play 21 |
| 1. | XG Roller++ | 12/11 3/1 | eq: +0.063 |
| Player:
Opponent: | 51.91% (G:4.19% B:0.03%)
48.09% (G:6.54% B:0.16%) | |
|
| 2. | XG Roller++ | 6/5 6/4* | eq: -0.011 (-0.074) |
| Player:
Opponent: | 49.45% (G:8.63% B:0.05%)
50.55% (G:17.42% B:0.91%) | |
|
| 3. | XG Roller++ | 3/2 3/1 | eq: -0.073 (-0.137) |
| Player:
Opponent: | 48.22% (G:5.34% B:0.03%)
51.78% (G:8.43% B:0.20%) | |
|
| 4. | XG Roller++ | 5/3 5/4* | eq: -0.133 (-0.197) |
| Player:
Opponent: | 47.63% (G:5.70% B:0.04%)
52.37% (G:16.96% B:0.92%) | |
|
Is there a position where the duplication of the 7 will be the best move?
I'm not sure how narrow your criteria are. I guess you mean a position similar to the one you posted (otherwise it would be too easy). Above is an example with a similar pipcount.
If yes, can this position be reached by playing best moves?
Certainly. I used to retrofit (from the opening position, cube position and match score taken into account) much less plausible-seeming situations than this, when I had more time on my hands. :)
The example below is one way the above position might be reached from a more natural-looking position a few rolls earlier:
From there, play out the best moves from this roll sequence (Blue first): 41, 22, 55, 22, 63, 64, 21.
Nack
 
  
| | White is Player 2
score: 0
pip: 125 | | 5 point match | pip: 110
score: 0
Blue is Player 1 |
|
| XGID=--BBbBD-C---b-c----b-Bbbb-:0:0:1:41:0:0:0:5:10 |
| Blue to play 41 |
| 1. | XG Roller++ | 6/1 | eq: +0.280 |
| Player:
Opponent: | 58.36% (G:12.16% B:0.22%)
41.64% (G:7.23% B:0.18%) | |
|
| 2. | XG Roller++ | 8/3 | eq: +0.235 (-0.045) |
| Player:
Opponent: | 57.17% (G:11.88% B:0.24%)
42.83% (G:7.49% B:0.18%) | |
|
| 3. | XG Roller++ | 6/5 6/2 | eq: +0.234 (-0.046) |
| Player:
Opponent: | 57.11% (G:11.74% B:0.24%)
42.89% (G:7.94% B:0.18%) | |
|
eXtreme Gammon Version: 2.10, MET: Kazaross XG2