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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Kc8 0
3 Na6 0
4 Bf8 0
5 e5 0
6 f5 0
7 Nc6 0
8 Kd6 0
9 Ke8 0
10 Kd8 0
11 Ke6 0
12 Bh8 0
13 e6 0
14 h5 0
15 c6 0
16 Kc6 0