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

Book: ∞ / 0

# move proof disproof
1 Nf6 0
2 f6 0
3 Ke5 0
4 Kd5 0
5 c5 0
6 Kf5 0
7 a6 0
8 Nh6 0
9 f5 0
10 Kd6 0
11 Nd7 0
12 Nc6 0
13 Na6 0
14 a5 0
15 g5 0
16 g6 0
17 Kf6 0
18 Kd7 0
19 c6 0