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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 f6 0
3 Ra7 0
4 Kc7 0
5 Kd6 0
6 c5 0
7 Bb7 0
8 Ke6 0
9 Ke7 0
10 Ke8 0
11 a5 0
12 Kd8 0