Tsume Othello #5622099 (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
28 26
Why this move works
The answer is d6. The line is losing, but d6 holds the result to a final −8 — fully 10 discs better than the next-best (−18).
Choosing g6, which flips 5 now, costs you dearly. Even when behind, read to the final count and pick the move that limits the damage.