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

Book: ∞ / 0

# move proof disproof
1 Kc7 0
2 a6 0
3 Nd7 0
4 Na6 0
5 g5 0
6 Ke8 0
7 Kc8 0
8 Kd7 0
9 Nc6 0
10 a5 0
11 g6 0
12 e5 0
13 e6 0