Tsume Othello #5622103 (empty 10)
To move: Black — find the best move
a
b
c
d
e
f
g
h
1
2
3
4
5
6
7
8
20 34
Why this move works
The answer is a3 or e8. In a close finish (2 behind), these two keep the most discs for you (2 better than the next-best).
g1 flips the most now (4 discs) but is not best. Read to the end to squeeze out the closest result.