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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 g5 0
3 c5 0
4 a5 0
5 e5 0
6 f6 0
7 a6 0
8 Nd7 0
9 e6 0
10 g6 0
11 Na6 0
12 Nf6 0
13 Nh6 0