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

Book: ∞ / 0

# move proof disproof
1 Ke8 0
2 Nc6 0
3 f5 0
4 Bb7 0
5 Rb7 0
6 Ra8 0
7 Kc6 0
8 Ke7 0
9 Kd8 0
10 a5 0
11 Kd6 0
12 Ke6 0
13 f6 0
14 Kc7 0
15 Rc7 0