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

Book: ∞ / 0

# move proof disproof
1 f6 0
2 Rd8 0
3 Re8 0
4 Rh8 0
5 Ra7 0
6 Ke6 0
7 Ng5 0
8 Nf6 0
9 Bb7 0
10 Nc6 0
11 Kc7 0
12 Kd6 0
13 Kc6 0
14 Rg8 0
15 f5 0
16 Ke8 0
17 Ke7 0
18 Kd8 0