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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 Bb7 0
3 Kc6 0
4 e6 0
5 e5 0
6 Ke6 0
7 Ra7 0
8 g6 0
9 a5 0
10 Nh6 0
11 Nc6 0
12 f6 0
13 Kd6 0
14 Kd8 0
15 Ke8 0
16 Kc7 0
17 g5 0
18 Nf6 0