Click on the third or sixth rank to set the en passant target square.

Book: ∞ / 0

# move proof disproof
1 g6 0
2 g5 0
3 e6 0
4 f6 0
5 Na6 0
6 Nd7 0
7 Nf6 0
8 Nh6 0
9 a5 0
10 e5 0
11 Kd8 0
12 a6 0
13 Kc7 0
14 Kb7 0
15 Kd7 0
16 f5 0