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

Book: ∞ / 0

# move proof disproof
1 c6 0
2 f6 0
3 h5 0
4 Kd6 0
5 e6 0
6 f5 0
7 Na6 0
8 a6 0
9 Nf6 0
10 Ke8 0
11 Kd8 0
12 Ke6 0
13 a5 0
14 e5 0
15 Nc6 0
16 Bg7 0
17 Kc6 0
18 Kc8 0