Tsume Othello #5621980 (empty 8)
To move: Black — find the best move
a
b
c
d
e
f
g
h
1
2
3
4
5
6
7
8
36 20
Why this move works
The answer is d1 or a7. Read to the end, both reach a final margin of +48 — a blowout, and 8 discs ahead of the next-best move.
Rather than the move that flips the most now (a5, 4 discs), choose the one that leaves you with the most discs at the finish.