1.  Rollout^{1}  10/4 8/3  eq: 0.8415 
 Player: Opponent:  30.79% (G:9.46% B:0.43%) 69.21% (G:23.13% B:1.32%)  Conf.: �0.0085 (0.8500...0.8329)  [96.4%] Duration: 8 minutes 21 seconds 

2.  Rollout^{1}  13/8 13/7  eq: 0.8526 (0.0112) 
 Player: Opponent:  30.37% (G:8.83% B:0.49%) 69.63% (G:22.31% B:1.27%)  Conf.: �0.0087 (0.8613...0.8439)  [3.6%] Duration: 8 minutes 43 seconds 

3.  XG Roller++  23/17 10/5  eq: 0.9411 (0.0996) 
 Player: Opponent:  33.46% (G:9.14% B:0.53%) 66.54% (G:33.28% B:1.87%)  

4.  XG Roller++  10/5 8/2  eq: 0.9701 (0.1286) 
 Player: Opponent:  30.03% (G:8.42% B:0.36%) 69.97% (G:26.19% B:1.72%)  

5.  XG Roller++  23/17 8/3  eq: 0.9894 (0.1480) 
 Player: Opponent:  32.27% (G:8.48% B:0.54%) 67.73% (G:32.55% B:1.76%)  

6.  XG Roller++  13/2  eq: 1.0000 (0.1585) 
 Player: Opponent:  28.02% (G:7.72% B:0.39%) 71.98% (G:25.01% B:1.70%)  

7.  XG Roller++  13/8 10/4  eq: 1.0000 (0.1585) 
 Player: Opponent:  27.14% (G:7.15% B:0.35%) 72.86% (G:24.29% B:1.43%)  


^{1} 5184 Games rolled with Variance Reduction. Dice Seed: 78623594 Moves: 3ply, cube decisions: XG Roller

1.  Rollout^{1}  13/8 13/7  eq: 0.841 
 Player: Opponent:  30.60% (G:8.79% B:0.46%) 69.40% (G:22.26% B:1.30%)  Conf.: กำ 0.009 (0.850...0.832)  [65.9%] Duration: 4 hours 36 minutes 

2.  Rollout^{1}  10/4 8/3  eq: 0.843 (0.003) 
 Player: Opponent:  30.82% (G:9.49% B:0.41%) 69.18% (G:23.43% B:1.35%)  Conf.: กำ 0.009 (0.852...0.834)  [34.1%] Duration: 5 hours 58 minutes 


^{1} 5184 Games rolled with Variance Reduction. Dice Seed: 31961703 Moves: 3ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.10
There are two 5k rollouts above, both of Snua's original position. The first one was done by Neil, favoring j (jump, 10/4 8/3) over D (Down, 13/8 13/7) by .011. The second, which was done by me, disagrees, favoring D over j by .003. Averaging these two results gives j a slight lead (.004). Any other move is a whopper.
Below are six variants, each supporting a different best play. If you widen your window enough, they'll appear sidebysidebyside, in a 3x2 grid.
[The final variant is questionable. In order to sufficiently enhance 13/2 (for which one of the respondents voted), I nudged forward checkers from both the 7pt and 6pt, beyond my usual tweaking guidelines.]
Nack
1.  Rollout^{1}  10/5 8/2  eq: 0.729 
 Player: Opponent:  33.23% (G:10.56% B:0.63%) 66.77% (G:24.57% B:1.56%)  Conf.: กำ 0.012 (0.741...0.717)  [100.0%] Duration: 1 hour 08 minutes 

2.  Rollout^{1}  10/4 8/3  eq: 0.777 (0.048) 
 Player: Opponent:  31.75% (G:9.88% B:0.44%) 68.25% (G:22.68% B:1.27%)  Conf.: กำ 0.012 (0.788...0.765)  [0.0%] Duration: 1 hour 06 minutes 

3.  Rollout^{1}  13/8 13/7  eq: 0.780 (0.051) 
 Player: Opponent:  31.33% (G:9.30% B:0.50%) 68.67% (G:21.97% B:1.17%)  Conf.: กำ 0.013 (0.792...0.767)  [0.0%] Duration: 1 hour 11 minutes 

4.  Rollout^{2}  13/2  eq: 0.801 (0.072) 
 Player: Opponent:  32.06% (G:10.49% B:0.63%) 67.94% (G:25.03% B:1.85%)  Conf.: กำ 0.020 (0.821...0.782)  [0.0%] Duration: 39 minutes 24 seconds 

5.  Rollout^{2}  13/8 10/4  eq: 0.841 (0.112) 
 Player: Opponent:  30.64% (G:9.63% B:0.54%) 69.36% (G:23.16% B:1.40%)  Conf.: กำ 0.018 (0.859...0.823)  [0.0%] Duration: 35 minutes 22 seconds 


^{1} 2592 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller
^{2} 1296 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller

1.  Rollout^{1}  13/8 13/7  eq: 0.760 
 Player: Opponent:  31.79% (G:10.17% B:0.77%) 68.21% (G:22.57% B:1.28%)  Conf.: กำ 0.021 (0.782...0.739)  [100.0%] Duration: 48 minutes 16 seconds 

2.  Rollout^{1}  10/4 8/3  eq: 0.977 (0.216) 
 Player: Opponent:  28.38% (G:8.75% B:0.52%) 71.62% (G:23.95% B:1.43%)  Conf.: กำ 0.018 (0.995...0.958)  [0.0%] Duration: 45 minutes 43 seconds 


^{1} 1296 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller

1.  Rollout^{1}  23/17 8/3  eq: 0.578 
 Player: Opponent:  37.06% (G:11.01% B:0.81%) 62.94% (G:27.68% B:1.42%)  Conf.: กำ 0.011 (0.589...0.567)  [71.8%] Duration: 1 hour 50 minutes 

2.  Rollout^{1}  13/8 13/7  eq: 0.583 (0.004) 
 Player: Opponent:  34.29% (G:11.17% B:0.76%) 65.71% (G:20.93% B:1.20%)  Conf.: กำ 0.010 (0.593...0.573)  [27.4%] Duration: 1 hour 55 minutes 

3.  Rollout^{1}  10/4 8/3  eq: 0.591 (0.013) 
 Player: Opponent:  34.92% (G:11.59% B:0.75%) 65.08% (G:21.53% B:1.25%)  Conf.: กำ 0.007 (0.598...0.584)  [0.8%] Duration: 1 hour 59 minutes 

4.  Rollout^{1}  23/17 10/5  eq: 0.606 (0.027) 
 Player: Opponent:  37.09% (G:11.37% B:0.79%) 62.91% (G:29.06% B:1.54%)  Conf.: กำ 0.010 (0.616...0.596)  [0.0%] Duration: 1 hour 51 minutes 

5.  Rollout^{2}  10/5 8/2  eq: 0.673 (0.094) 
 Player: Opponent:  34.31% (G:11.46% B:0.79%) 65.69% (G:24.84% B:1.80%)  Conf.: กำ 0.022 (0.695...0.651)  [0.0%] Duration: 32 minutes 16 seconds 


^{1} 5184 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller
^{2} 1296 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller

1.  Rollout^{1}  23/17 10/5  eq: 0.528 
 Player: Opponent:  38.29% (G:11.18% B:0.70%) 61.71% (G:27.85% B:1.47%)  Conf.: กำ 0.017 (0.545...0.511)  [100.0%] Duration: 52 minutes 07 seconds 

2.  Rollout^{1}  23/17 8/3  eq: 0.590 (0.062) 
 Player: Opponent:  37.15% (G:11.38% B:0.77%) 62.85% (G:28.41% B:1.50%)  Conf.: กำ 0.019 (0.609...0.571)  [0.0%] Duration: 47 minutes 28 seconds 

3.  Rollout^{1}  10/4 8/3  eq: 0.629 (0.101) 
 Player: Opponent:  34.47% (G:10.12% B:0.59%) 65.53% (G:20.22% B:1.12%)  Conf.: กำ 0.013 (0.642...0.616)  [0.0%] Duration: 49 minutes 03 seconds 


^{1} 1296 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller

1.  Rollout^{1}  10/4 8/3  eq: 0.701 
 Player: Opponent:  32.93% (G:10.03% B:0.58%) 67.07% (G:22.04% B:1.33%)  Conf.: กำ 0.019 (0.720...0.682)  [100.0%] Duration: 52 minutes 31 seconds 

2.  Rollout^{1}  10/5 8/2  eq: 0.784 (0.083) 
 Player: Opponent:  32.44% (G:9.16% B:0.33%) 67.56% (G:24.38% B:1.53%)  Conf.: กำ 0.017 (0.801...0.767)  [0.0%] Duration: 52 minutes 41 seconds 

3.  Rollout^{1}  13/8 13/7  eq: 0.822 (0.120) 
 Player: Opponent:  30.70% (G:8.07% B:0.46%) 69.30% (G:20.93% B:1.17%)  Conf.: กำ 0.016 (0.838...0.806)  [0.0%] Duration: 53 minutes 00 second 


^{1} 1296 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller

1.  Rollout^{1}  13/2  eq: 0.279 
 Player: Opponent:  42.46% (G:15.42% B:0.85%) 57.54% (G:21.33% B:1.46%)  Conf.: กำ 0.007 (0.286...0.272)  [86.4%] Duration: 1 hour 22 minutes 

2.  Rollout^{1}  10/5 8/2  eq: 0.285 (0.006) 
 Player: Opponent:  43.20% (G:15.18% B:0.83%) 56.80% (G:21.46% B:1.26%)  Conf.: กำ 0.007 (0.292...0.278)  [13.6%] Duration: 1 hour 18 minutes 

3.  Rollout^{2}  13/8 13/7  eq: 0.328 (0.049) 
 Player: Opponent:  41.20% (G:13.14% B:0.66%) 58.80% (G:19.65% B:1.03%)  Conf.: กำ 0.013 (0.341...0.316)  [0.0%] Duration: 30 minutes 01 second 

4.  Rollout^{2}  10/4 8/3  eq: 0.358 (0.078) 
 Player: Opponent:  40.91% (G:13.30% B:0.60%) 59.09% (G:19.45% B:1.06%)  Conf.: กำ 0.015 (0.372...0.343)  [0.0%] Duration: 33 minutes 08 seconds 


^{1} 5184 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller
^{2} 1296 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller
