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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 h5 0
3 Na6 0
4 Nh6 0
5 f6 0
6 Kd8 0
7 g5 0
8 h6 0
9 b6 0
10 b5 0
11 g6 0
12 e5 0
13 Nc6 0
14 e6 0
15 d6 0
16 Nf6 0
17 d5 0
18 a6 0