My variants for the Othello Quiz 2015, Problem 1, can be viewed here.
Near the end of that post, I wrote, "If there is sufficient interest, I'll try to find time to post variants of other Othelloquiz positions." As nobody responded, I was going to stop there. However, as honorable Othello himself has now responded (thank you), I'll work on at least one more problem. Here goes:
1.  Rollout^{1}  8/5 2/1  eq: +0.419 
 Player: Opponent:  73.99% (G:13.95% B:0.39%) 26.01% (G:2.09% B:0.08%)  Conf.: กำ 0.006 (+0.413...+0.425)  [100.0%] Duration: 13 minutes 52 seconds 

2.  Rollout^{1}  8/5 6/5  eq: +0.334 (0.084) 
 Player: Opponent:  71.33% (G:14.02% B:0.27%) 28.67% (G:2.79% B:0.13%)  Conf.: กำ 0.006 (+0.328...+0.341)  [0.0%] Duration: 13 minutes 48 seconds 

3.  Rollout^{1}  5/1  eq: +0.326 (0.093) 
 Player: Opponent:  71.03% (G:12.37% B:0.23%) 28.97% (G:2.65% B:0.11%)  Conf.: กำ 0.006 (+0.320...+0.332)  [0.0%] Duration: 11 minutes 26 seconds 

4.  Rollout^{1}  8/4  eq: +0.323 (0.095) 
 Player: Opponent:  71.19% (G:19.20% B:0.53%) 28.81% (G:3.35% B:0.14%)  Conf.: กำ 0.007 (+0.317...+0.330)  [0.0%] Duration: 14 minutes 51 seconds 

5.  Rollout^{1}  6/2  eq: +0.277 (0.142) 
 Player: Opponent:  69.42% (G:12.46% B:0.16%) 30.58% (G:3.10% B:0.12%)  Conf.: กำ 0.007 (+0.271...+0.284)  [0.0%] Duration: 10 minutes 48 seconds 

6.  Rollout^{1}  8/7 8/5  eq: +0.233 (0.185) 
 Player: Opponent:  67.78% (G:20.48% B:0.47%) 32.22% (G:3.56% B:0.28%)  Conf.: กำ 0.008 (+0.226...+0.241)  [0.0%] Duration: 11 minutes 46 seconds 


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

Above is my rollout of the original position. (The margins in Othello's 1k rollout are similar, though 6/2 is omitted.)
Let's suppose that at some point, White made her 5pt with 31. If we "unmake" half of her 5pt, we get (lefthand) Variant 1 below, which essentially puts 8/4 and 8/5 2/1 into a tie. If we unmake the other half of White's 5pt, we get (righthand) Variant 2, a clear contrast with the original position.
1.  Rollout^{1}  8/4  eq: +0.448 
 Player: Opponent:  74.68% (G:20.45% B:0.73%) 25.32% (G:2.54% B:0.16%)  Conf.: กำ 0.003 (+0.445...+0.451)  [99.5%] Duration: 2 hours 08 minutes 

2.  Rollout^{1}  8/5 2/1  eq: +0.442 (0.006) 
 Player: Opponent:  74.61% (G:16.47% B:0.34%) 25.39% (G:2.01% B:0.06%)  Conf.: กำ 0.003 (+0.439...+0.445)  [0.5%] Duration: 2 hours 00 minute 

3.  Rollout^{2}  8/7 8/5  eq: +0.397 (0.051) 
 Player: Opponent:  72.77% (G:21.65% B:0.42%) 27.23% (G:2.36% B:0.16%)  Conf.: กำ 0.007 (+0.390...+0.403)  [0.0%] Duration: 44 minutes 28 seconds 

4.  Rollout^{2}  8/5 6/5  eq: +0.363 (0.085) 
 Player: Opponent:  72.35% (G:16.66% B:0.39%) 27.65% (G:2.64% B:0.08%)  Conf.: กำ 0.007 (+0.356...+0.369)  [0.0%] Duration: 45 minutes 24 seconds 

5.  Rollout^{2}  5/1  eq: +0.357 (0.091) 
 Player: Opponent:  71.87% (G:15.00% B:0.35%) 28.13% (G:2.57% B:0.10%)  Conf.: กำ 0.007 (+0.351...+0.364)  [0.0%] Duration: 44 minutes 27 seconds 

6.  Rollout^{3}  8/7 5/2  eq: +0.323 (0.125) 
 Player: Opponent:  70.48% (G:21.09% B:0.72%) 29.52% (G:2.81% B:0.12%)  Conf.: กำ 0.015 (+0.308...+0.339)  [0.0%] Duration: 7 minutes 21 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
^{3} 252 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller

1.  Rollout^{1}  8/4  eq: +0.529 
 Player: Opponent:  77.40% (G:19.77% B:0.56%) 22.60% (G:1.91% B:0.08%)  Conf.: กำ 0.006 (+0.523...+0.535)  [100.0%] Duration: 38 minutes 25 seconds 

2.  Rollout^{1}  8/5 2/1  eq: +0.473 (0.056) 
 Player: Opponent:  75.48% (G:17.61% B:0.58%) 24.52% (G:1.82% B:0.11%)  Conf.: กำ 0.006 (+0.467...+0.480)  [0.0%] Duration: 36 minutes 18 seconds 

3.  Rollout^{1}  8/7 8/5  eq: +0.470 (0.058) 
 Player: Opponent:  74.74% (G:23.49% B:0.63%) 25.26% (G:2.06% B:0.12%)  Conf.: กำ 0.007 (+0.464...+0.477)  [0.0%] Duration: 42 minutes 38 seconds 

4.  Rollout^{1}  8/5 6/5  eq: +0.404 (0.125) 
 Player: Opponent:  73.52% (G:18.15% B:0.61%) 26.48% (G:2.25% B:0.08%)  Conf.: กำ 0.007 (+0.397...+0.410)  [0.0%] Duration: 37 minutes 34 seconds 

5.  Rollout^{1}  8/7 5/2  eq: +0.390 (0.138) 
 Player: Opponent:  72.85% (G:17.75% B:0.30%) 27.15% (G:2.13% B:0.09%)  Conf.: กำ 0.006 (+0.384...+0.397)  [0.0%] Duration: 33 minutes 26 seconds 

6.  Rollout^{1}  5/1  eq: +0.378 (0.151) 
 Player: Opponent:  72.57% (G:16.23% B:0.44%) 27.43% (G:2.49% B:0.12%)  Conf.: กำ 0.006 (+0.371...+0.384)  [0.0%] Duration: 27 minutes 17 seconds 


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

If we remake White's 5pt (returning to the original position) and instead move White's blot from 7pt to 1pt, we get Variant 3 below, which is a cusp. Any White board weaker than that will make Blue's 8/4 a clear winner. [For example, see Tim's variant (second diagram of that post).]
1.  Rollout^{1}  8/4  eq: +0.469 
 Player: Opponent:  75.54% (G:20.25% B:0.75%) 24.46% (G:2.55% B:0.12%)  Conf.: กำ 0.003 (+0.466...+0.473)  [92.3%] Duration: 1 hour 38 minutes 

2.  Rollout^{1}  8/5 2/1  eq: +0.466 (0.003) 
 Player: Opponent:  76.62% (G:11.98% B:0.34%) 23.38% (G:1.63% B:0.07%)  Conf.: กำ 0.003 (+0.463...+0.469)  [7.7%] Duration: 1 hour 21 minutes 

3.  Rollout^{2}  8/7 8/5  eq: +0.410 (0.059) 
 Player: Opponent:  73.27% (G:22.31% B:0.95%) 26.73% (G:2.62% B:0.21%)  Conf.: กำ 0.007 (+0.403...+0.417)  [0.0%] Duration: 21 minutes 12 seconds 

4.  Rollout^{2}  8/5 6/5  eq: +0.395 (0.074) 
 Player: Opponent:  74.37% (G:12.79% B:0.32%) 25.63% (G:2.10% B:0.11%)  Conf.: กำ 0.006 (+0.389...+0.402)  [0.0%] Duration: 16 minutes 50 seconds 

5.  Rollout^{2}  5/1  eq: +0.383 (0.087) 
 Player: Opponent:  73.69% (G:11.05% B:0.30%) 26.31% (G:2.00% B:0.06%)  Conf.: กำ 0.006 (+0.376...+0.389)  [0.0%] Duration: 13 minutes 37 seconds 

6.  Rollout^{3}  8/7 5/2  eq: +0.337 (0.132) 
 Player: Opponent:  71.50% (G:18.82% B:0.76%) 28.50% (G:2.81% B:0.10%)  Conf.: กำ 0.021 (+0.316...+0.358)  [0.0%] Duration: 1 minute 44 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
^{3} 132 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller

Finally, the original board position is restored but the match score reversed, as shown in Variant 4 below.
1.  Rollout^{1}  8/4  eq: +0.595 
 Player: Opponent:  71.49% (G:17.01% B:0.38%) 28.51% (G:2.88% B:0.14%)  Conf.: กำ 0.003 (+0.593...+0.598)  [100.0%] Duration: 1 hour 38 minutes 

2.  Rollout^{1}  8/5 2/1  eq: +0.582 (0.013) 
 Player: Opponent:  74.46% (G:11.35% B:0.12%) 25.54% (G:2.00% B:0.09%)  Conf.: กำ 0.002 (+0.580...+0.585)  [0.0%] Duration: 1 hour 38 minutes 

3.  Rollout^{2}  8/7 8/5  eq: +0.531 (0.064) 
 Player: Opponent:  69.17% (G:16.64% B:0.24%) 30.83% (G:2.78% B:0.22%)  Conf.: กำ 0.006 (+0.525...+0.538)  [0.0%] Duration: 28 minutes 38 seconds 

4.  Rollout^{2}  8/5 6/5  eq: +0.516 (0.080) 
 Player: Opponent:  72.07% (G:10.74% B:0.12%) 27.93% (G:2.41% B:0.10%)  Conf.: กำ 0.005 (+0.511...+0.520)  [0.0%] Duration: 26 minutes 32 seconds 

5.  Rollout^{2}  5/1  eq: +0.501 (0.095) 
 Player: Opponent:  71.54% (G:10.03% B:0.06%) 28.46% (G:2.46% B:0.09%)  Conf.: กำ 0.005 (+0.496...+0.505)  [0.0%] Duration: 27 minutes 40 seconds 

6.  Rollout^{3}  6/2  eq: +0.463 (0.133) 
 Player: Opponent:  69.96% (G:10.02% B:0.18%) 30.04% (G:2.80% B:0.17%)  Conf.: กำ 0.014 (+0.449...+0.477)  [0.0%] Duration: 3 minutes 23 seconds 

7.  Rollout^{3}  8/7 5/2  eq: +0.458 (0.138) 
 Player: Opponent:  66.75% (G:15.59% B:0.10%) 33.25% (G:2.78% B:0.12%)  Conf.: กำ 0.016 (+0.442...+0.473)  [0.0%] Duration: 3 minutes 48 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
^{3} 134 Games rolled with Variance Reduction. Moves: 3ply, cube decisions: XG Roller

[If the match score is bumped from 0 to 2, up to 1 to 3 (to 5 points), the situation escalates to gammon go, and 8/4 rolls out as best by .034, not shown.]
Nack