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

Book: ∞ / 0

# move proof disproof
1 Kd6 0
2 Kd5 0
3 Nd7 0
4 a6 0
5 Na6 0
6 Kf6 0
7 Ke5 0
8 f6 0
9 g6 0
10 Kf5 0
11 Kd7 0
12 f5 0
13 g5 0