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

Book: ∞ / 0

# move proof disproof
1 f6 0
2 d6 0
3 g6 0
4 Rh7 0
5 Kd8 0
6 f5 0
7 d5 0
8 a5 0
9 g5 0
10 Nf6 0
11 h5 0
12 Nc6 0
13 Na6 0
14 Bb7 0
15 Ba6 0
16 a6 0
17 e5 0
18 e6 0