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

Book: ∞ / 0

# move proof disproof
1 f6 0
2 Bb7 0
3 a5 0
4 Ke6 0
5 a6 0
6 Na6 0
7 Ba6 0
8 c5 0
9 Kc7 0
10 Kd8 0
11 Ke8 0
12 f5 0
13 Ke7 0
14 Kd6 0