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

Book: ∞ / 0

# move proof disproof
1 c5 0
2 Nc6 0
3 f5 0
4 c6 0
5 a5 0
6 Ra7 0
7 Ke6 0
8 Ke8 0
9 Kd8 0
10 Kc6 0
11 Bb7 0
12 Ke7 0
13 Kd6 0