1.  Rollout^{1}  7/1* 6/1  eq: +0.104 
 Player: Opponent:  52.03% (G:17.83% B:0.66%) 47.97% (G:13.81% B:0.56%)  Conf.: � 0.018 (+0.085...+0.122)  [100.0%] Duration: 20 minutes 42 seconds 

2.  Rollout^{2}  21/16 13/7  eq: +0.008 (0.095) 
 Player: Opponent:  50.95% (G:13.74% B:0.66%) 49.05% (G:15.10% B:0.80%)  Conf.: � 0.016 (0.008...+0.025)  [0.0%] Duration: 21 minutes 43 seconds 

3.  3ply  13/7 6/1*  eq: 0.096 (0.200) 
 Player: Opponent:  47.80% (G:13.44% B:0.48%) 52.20% (G:15.05% B:0.68%)  

4.  3ply  8/2 7/2  eq: 0.117 (0.221) 
 Player: Opponent:  47.08% (G:13.27% B:0.60%) 52.92% (G:14.91% B:0.55%)  

5.  3ply  13/7 8/3  eq: 0.175 (0.278) 
 Player: Opponent:  46.05% (G:13.08% B:0.57%) 53.95% (G:16.89% B:0.81%)  

6.  2ply  24/13  eq: 0.219 (0.323) 
 Player: Opponent:  45.08% (G:9.93% B:0.38%) 54.92% (G:15.85% B:0.55%)  

7.  2ply  13/8 7/1*  eq: 0.246 (0.350) 
 Player: Opponent:  43.91% (G:11.82% B:0.40%) 56.09% (G:16.68% B:0.78%)  

8.  2ply  21/16 7/1*  eq: 0.250 (0.354) 
 Player: Opponent:  44.64% (G:10.59% B:0.38%) 55.36% (G:17.60% B:0.84%)  


^{1} 684 Games rolled with Variance Reduction. Moves and cube decisions: 3ply Search interval: Large
^{2} 683 Games rolled with Variance Reduction. Moves and cube decisions: 3ply Search interval: Large

Above I have copied the mixed bot info that Leobueno posted for his original position.
The first variant below (lefthand, if you widen your window enough) makes two adjustments that balance the checker distribution: (a) 8/13 for Blue and (b) 6/8 for White.
Either (a) or (b) by itself is not enough to make Z (reverse split, 21/16 13/7) better than P (Point, 7/1* 6/1). [Even Blue 6/13 by itself is not quite enough to put Z on top  it falls short by .007, rollout not shown.]
Variant 2 (the second or righthand position below) makes one more change, which is to nudge White's 20pt blot back to her 21pt. With that checker pushed a bit deeper, Blue's prime becomes more valuable, which adds support to Z. On the other hand, the loss of 4 duplication (13/9* and 24/20) reduces support of Z. These two effects offset each other, and the net change in the Z/P margin is a mere .009.
1.  Rollout^{1}  21/16 13/7  eq: 0.137 
 Player: Opponent:  47.25% (G:11.72% B:0.52%) 52.75% (G:15.30% B:0.60%)  Conf.: กำ 0.007 (0.144...0.129)  [100.0%] Duration: 4 hours 43 minutes 

2.  Rollout^{1}  7/1* 6/1  eq: 0.164 (0.028) 
 Player: Opponent:  45.47% (G:13.26% B:0.27%) 54.53% (G:14.51% B:0.57%)  Conf.: กำ 0.007 (0.171...0.157)  [0.0%] Duration: 4 hours 22 minutes 

3.  Rollout^{2}  13/8 13/7  eq: 0.236 (0.099) 
 Player: Opponent:  44.59% (G:11.40% B:0.51%) 55.41% (G:15.34% B:0.65%)  Conf.: กำ 0.015 (0.251...0.221)  [0.0%] Duration: 1 hour 24 minutes 

4.  Rollout^{2}  13/7 6/1*  eq: 0.273 (0.136) 
 Player: Opponent:  43.52% (G:11.51% B:0.36%) 56.48% (G:15.98% B:0.78%)  Conf.: กำ 0.014 (0.287...0.259)  [0.0%] Duration: 1 hour 26 minutes 

5.  Rollout^{2}  8/2 7/2  eq: 0.315 (0.178) 
 Player: Opponent:  42.28% (G:11.61% B:0.48%) 57.72% (G:16.52% B:0.74%)  Conf.: กำ 0.015 (0.329...0.300)  [0.0%] Duration: 1 hour 19 minutes 


^{1} 5184 Games rolled with Variance Reduction. Dice Seed: 31027603 Moves: 3ply, cube decisions: XG Roller
^{2} 1296 Games rolled with Variance Reduction. Dice Seed: 31027603 Moves: 3ply, cube decisions: XG Roller

1.  Rollout^{1}  21/16 13/7  eq: 0.164 
 Player: Opponent:  46.72% (G:10.36% B:0.47%) 53.28% (G:15.08% B:0.56%)  Conf.: กำ 0.007 (0.172...0.157)  [100.0%] Duration: 2 hours 17 minutes 

2.  Rollout^{1}  7/1* 6/1  eq: 0.184 (0.019) 
 Player: Opponent:  45.03% (G:13.24% B:0.30%) 54.97% (G:14.71% B:0.59%)  Conf.: กำ 0.007 (0.191...0.176)  [0.0%] Duration: 2 hours 04 minutes 

3.  Rollout^{2}  13/8 13/7  eq: 0.229 (0.065) 
 Player: Opponent:  45.05% (G:11.20% B:0.46%) 54.95% (G:15.31% B:0.68%)  Conf.: กำ 0.016 (0.245...0.213)  [0.0%] Duration: 56 minutes 31 seconds 

4.  Rollout^{2}  13/7 6/1*  eq: 0.261 (0.096) 
 Player: Opponent:  43.85% (G:11.69% B:0.39%) 56.15% (G:15.83% B:0.72%)  Conf.: กำ 0.015 (0.275...0.246)  [0.0%] Duration: 59 minutes 18 seconds 

5.  Rollout^{2}  8/2 7/2  eq: 0.337 (0.172) 
 Player: Opponent:  42.03% (G:11.72% B:0.45%) 57.97% (G:17.21% B:0.74%)  Conf.: กำ 0.014 (0.350...0.323)  [0.0%] Duration: 51 minutes 38 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

eXtreme Gammon Version: 2.10
If White's 21pt checker is pushed back further, to her 22pt or 23pt, Blue's prime gains in value and Z easily beats P.
Nack