Spoiler
13/9(3) 8/4 is the alternative move, it's not too far behind since rkb usually has to take some risks hitting that blot. Also, making our fourpoint gives us a much stronger homeboard for a hitting contest than 6/2 with two innerboard blots. Still, it's just too costly to leave a direct here.
1. Rollout 13/9(3) 6/2 Eq.: -0,5622
38,49 6,21 0,12 - 61,51 10,25 0,66 CL -0,3063 CF -0,5622
[ 0,10 0,09 0,03 - 0,10 0,11 0,10 CL 0,0032 CF 0,0080]
Full cubeful rollout with var.redn.
2592 games, Mersenne Twister dice gen. with seed 862504334 and quasi-random dice
Play: 0-ply cubeful prune [expert]
Cube: 0-ply cubeful prune [expert]
2. Rollout 13/9(3) 8/4 Eq.: -0,6054 ( -0,0432)
36,18 7,04 0,18 - 63,82 9,54 0,57 CL -0,3302 CF -0,6054
[ 0,11 0,10 0,04 - 0,11 0,11 0,08 CL 0,0033 CF 0,0083]
3. Rollout 13/9(2) 8/4(2) Eq.: -0,6298 ( -0,0676)
35,33 6,35 0,14 - 64,67 10,30 0,76 CL -0,3640 CF -0,6298
[ 0,27 0,26 0,03 - 0,27 0,30 0,31 CL 0,0082 CF 0,0214]
432 games
4. Rollout 13/9 8/4(2) 6/2 Eq.: -0,6873 ( -0,1251)
33,43 5,75 0,10 - 66,57 11,22 1,77 CL -0,4253 CF -0,6873
[ 0,51 0,39 0,01 - 0,51 0,45 1,06 CL 0,0150 CF 0,0368]
108 games