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

Book: ∞ / 0

# move proof disproof
1 Kf7 0
2 a6 0
3 Kd7 0
4 Ba6 0
5 Ke5 0
6 Bb7 0
7 Kd6 0
8 Kf6 0
9 Nd7 0
10 Na6 0
11 Nc6 0
12 Kf5 0
13 Bd7 0
14 d4 0
15 a5 0