Spoiler
Very small differences here, since we get gammoned anyway over 90% of the time. Plays with 10/4 or 8/2 are wrong since they waste some pips in the cross-over race. So it's about how many checkers are played 19/13 and how many 13/7, after entering B/19. The Herd decided to move all three sixes to the midpoint; the bot prefers to use one six for 13/7. I think it has to do with flexibility, piling 6 checkers on the midpoint gives us a bit less options to spread checkers around in the future, especially with high rolls. But it's all extremely close anyway.
1. Rollout¹ Bar/7 19/13 eq:-2,204
Player : 0,00% (G:0,00% B:0,00%)
Opponent: 100,00% (G:91,51% B:0,00%)
Confidence: ± 0,001 (-2,205<E<-2,203)
Duration: 40,5 seconds
2. Rollout¹ Bar/7 13/7 eq:-2,207 (-0,003)
Player : 0,00% (G:0,00% B:0,00%)
Opponent: 100,00% (G:91,75% B:0,00%)
Confidence: ± 0,001 (-2,208<E<-2,206)
Duration: 43,7 seconds
* 3. Rollout¹ Bar/13 19/13(2) eq:-2,207 (-0,003)
Player : 0,00% (G:0,00% B:0,00%)
Opponent: 100,00% (G:91,77% B:0,00%)
Confidence: ± 0,001 (-2,208<E<-2,206)
Duration: 28,4 seconds
4. Rollout¹ Bar/19 13/7(3) eq:-2,208 (-0,004)
Player : 0,00% (G:0,00% B:0,00%)
Opponent: 100,00% (G:91,82% B:0,00%)
Confidence: ± 0,001 (-2,209<E<-2,207)
Duration: 41,1 seconds
5. Rollout² Bar/7 10/4 eq:-2,216 (-0,011)
Player : 0,00% (G:0,00% B:0,00%)
Opponent: 100,00% (G:92,43% B:0,00%)
Confidence: ± 0,002 (-2,218<E<-2,214)
Duration: 11,3 seconds
6. Rollout² Bar/7 8/2 eq:-2,225 (-0,021)
Player : 0,00% (G:0,00% B:0,00%)
Opponent: 100,00% (G:93,10% B:0,00%)
Confidence: ± 0,002 (-2,227<E<-2,223)
Duration: 13,4 seconds
7. Rollout² Bar/13 10/4(2) eq:-2,228 (-0,024)
Player : 0,00% (G:0,00% B:0,00%)
Opponent: 100,00% (G:93,35% B:0,00%)
Confidence: ± 0,002 (-2,230<E<-2,226)
Duration: 8,6 seconds
8. Rollout² Bar/19 13/7 10/4(2) eq:-2,228 (-0,024)
Player : 0,00% (G:0,00% B:0,00%)
Opponent: 100,00% (G:93,35% B:0,00%)
Confidence: ± 0,002 (-2,230<E<-2,226)
Duration: 11,6 seconds
¹ 5184 Games rolled with Variance Reduction.
Moves: 1 ply, cube decisions: 3 ply Red
² 1296 Games rolled with Variance Reduction.
Moves: 1 ply, cube decisions: 3 ply Red
eXtreme Gammon Version: 1.14, MET: Rockwell-Kazaross