1.  Rollout^{1}  20/15  eq: +0.596 
 Player: Opponent:  66.62% (G:13.48% B:0.56%) 33.38% (G:10.41% B:0.22%)  Conf.: � 0.014 (+0.582...+0.610)  [100.0%] Duration: 17 minutes 29 seconds 

2.  Rollout^{1}  20/17 10/8  eq: +0.517 (0.079) 
 Player: Opponent:  64.70% (G:16.42% B:0.91%) 35.30% (G:13.87% B:0.40%)  Conf.: � 0.017 (+0.501...+0.534)  [0.0%] Duration: 17 minutes 14 seconds 

3.  Rollout^{1}  13/8  eq: +0.479 (0.117) 
 Player: Opponent:  64.22% (G:18.76% B:1.04%) 35.78% (G:16.24% B:0.77%)  Conf.: � 0.013 (+0.466...+0.493)  [0.0%] Duration: 15 minutes 40 seconds 

4.  Rollout^{1}  13/11 13/10  eq: +0.410 (0.186) 
 Player: Opponent:  61.54% (G:15.50% B:0.75%) 38.46% (G:12.82% B:0.39%)  Conf.: � 0.013 (+0.398...+0.423)  [0.0%] Duration: 16 minutes 49 seconds 

5.  Rollout^{1}  10/5  eq: +0.394 (0.202) 
 Player: Opponent:  60.76% (G:16.05% B:0.80%) 39.24% (G:13.01% B:0.30%)  Conf.: � 0.015 (+0.379...+0.409)  [0.0%] Duration: 14 minutes 47 seconds 


^{1} 1296 Games rolled with Variance Reduction. Dice Seed: 271828 Moves: 3ply, cube decisions: XG Roller

I tried several times to post this message in full but was kicked out. In case length is the problem, I am posting in two parts.
Above is Tim's rollout of the original position.
Below are four variants (in a 2x2 grid, if you widen your window) that contrast with the original, and with each other. In a separate message, I will post four more such variants.
Between these two posts (part 1 and part 2), there are NINE related positions, each having a different best play.
Nack
1.  Rollout^{1}  20/17 10/8  eq: +0.613 
 Player: Opponent:  67.24% (G:15.39% B:0.75%) 32.76% (G:11.92% B:0.24%)  Conf.: กำ 0.007 (+0.606...+0.620)  [99.3%] Duration: 2 hours 45 minutes 

2.  Rollout^{1}  20/15  eq: +0.601 (0.013) 
 Player: Opponent:  66.89% (G:13.98% B:0.64%) 33.11% (G:11.72% B:0.25%)  Conf.: กำ 0.007 (+0.593...+0.608)  [0.7%] Duration: 3 hours 16 minutes 

3.  Rollout^{2}  20/17 13/11  eq: +0.546 (0.067) 
 Player: Opponent:  65.29% (G:15.41% B:0.85%) 34.71% (G:13.44% B:0.49%)  Conf.: กำ 0.015 (+0.531...+0.561)  [0.0%] Duration: 51 minutes 37 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}  13/8  eq: +0.528 
 Player: Opponent:  65.50% (G:15.91% B:0.88%) 34.50% (G:15.51% B:0.65%)  Conf.: กำ 0.007 (+0.521...+0.534)  [100.0%] Duration: 2 hours 26 minutes 

2.  Rollout^{1}  20/15  eq: +0.474 (0.053) 
 Player: Opponent:  64.20% (G:10.24% B:0.43%) 35.80% (G:11.93% B:0.22%)  Conf.: กำ 0.006 (+0.468...+0.480)  [0.0%] Duration: 2 hours 51 minutes 

3.  Rollout^{2}  16/14 16/13  eq: +0.453 (0.075) 
 Player: Opponent:  64.03% (G:13.79% B:0.79%) 35.97% (G:16.60% B:0.46%)  Conf.: กำ 0.015 (+0.438...+0.467)  [0.0%] Duration: 1 hour 06 minutes 


^{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}  13/11 13/10  eq: +0.656 
 Player: Opponent:  66.11% (G:19.46% B:0.70%) 33.89% (G:9.10% B:0.33%)  Conf.: กำ 0.008 (+0.648...+0.665)  [99.9%] Duration: 4 hours 15 minutes 

2.  Rollout^{1}  13/8  eq: +0.639 (0.017) 
 Player: Opponent:  65.81% (G:21.77% B:1.11%) 34.19% (G:12.50% B:0.64%)  Conf.: กำ 0.008 (+0.632...+0.647)  [0.1%] Duration: 3 hours 45 minutes 

3.  Rollout^{2}  20/15  eq: +0.606 (0.051) 
 Player: Opponent:  66.11% (G:16.78% B:0.64%) 33.89% (G:9.56% B:0.28%)  Conf.: กำ 0.009 (+0.596...+0.615)  [0.0%] Duration: 3 hours 34 minutes 

4.  Rollout^{3}  10/5  eq: +0.583 (0.073) 
 Player: Opponent:  64.56% (G:18.26% B:0.58%) 35.44% (G:8.92% B:0.25%)  Conf.: กำ 0.013 (+0.570...+0.596)  [0.0%] Duration: 44 minutes 08 seconds 

5.  Rollout^{3}  13/11 10/7  eq: +0.568 (0.088) 
 Player: Opponent:  64.41% (G:20.56% B:0.90%) 35.59% (G:12.26% B:0.40%)  Conf.: กำ 0.016 (+0.552...+0.584)  [0.0%] Duration: 38 minutes 22 seconds 


^{1} 5184 Games rolled with Variance Reduction. Dice Seed: 65876923 Moves: 3ply, cube decisions: XG Roller
^{2} 3888 Games rolled with Variance Reduction. Dice Seed: 65876923 Moves: 3ply, cube decisions: XG Roller
^{3} 1296 Games rolled with Variance Reduction. Dice Seed: 65876923 Moves: 3ply, cube decisions: XG Roller

1.  Rollout^{1}  10/5  eq: +0.615 
 Player: Opponent:  63.63% (G:23.48% B:1.00%) 36.37% (G:10.15% B:0.32%)  Conf.: กำ 0.007 (+0.607...+0.622)  [100.0%] Duration: 1 hour 23 minutes 

2.  Rollout^{1}  13/11 13/10  eq: +0.580 (0.035) 
 Player: Opponent:  63.41% (G:21.93% B:1.13%) 36.59% (G:10.66% B:0.35%)  Conf.: กำ 0.009 (+0.571...+0.588)  [0.0%] Duration: 1 hour 40 minutes 

3.  Rollout^{2}  20/17 10/8  eq: +0.564 (0.051) 
 Player: Opponent:  63.50% (G:22.57% B:1.25%) 36.50% (G:11.60% B:0.41%)  Conf.: กำ 0.018 (+0.546...+0.582)  [0.0%] Duration: 40 minutes 29 seconds 

4.  Rollout^{2}  10/7 6/4  eq: +0.559 (0.056) 
 Player: Opponent:  62.72% (G:22.28% B:0.96%) 37.28% (G:10.90% B:0.34%)  Conf.: กำ 0.015 (+0.544...+0.574)  [0.0%] Duration: 31 minutes 38 seconds 

5.  Rollout^{2}  20/18 10/7  eq: +0.542 (0.073) 
 Player: Opponent:  62.59% (G:21.18% B:1.11%) 37.41% (G:10.34% B:0.31%)  Conf.: กำ 0.015 (+0.527...+0.557)  [0.0%] Duration: 38 minutes 33 seconds 

6.  Rollout^{2}  20/15  eq: +0.517 (0.098) 
 Player: Opponent:  62.95% (G:18.46% B:1.06%) 37.05% (G:10.83% B:0.30%)  Conf.: กำ 0.016 (+0.501...+0.533)  [0.0%] Duration: 44 minutes 39 seconds 


^{1} 5184 Games rolled with Variance Reduction. Dice Seed: 65876923 Moves: 3ply, cube decisions: XG Roller
^{2} 1296 Games rolled with Variance Reduction. Dice Seed: 65876923 Moves: 3ply, cube decisions: XG Roller
