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

Book: ∞ / 0

# move proof disproof
1 f6 0
2 Rh7 0
3 d5 0
4 a5 0
5 g6 0
6 Rc8 0
7 Nf6 0
8 Kd7 0
9 Rd8 0
10 Ra8 0
11 g5 0
12 e6 0
13 b6 0
14 f5 0
15 e5 0
16 Kd8 0
17 a6 0
18 h5 0