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

Book: ∞ / 0

# move proof disproof
1 c6 0
2 f5 0
3 Ke6 0
4 e4 0
5 Kc6 0
6 Nc6 0
7 Na6 0
8 c5 0
9 f6 0
10 a6 0
11 a5 0
12 Ba6 0
13 Ke8 0
14 Kd8 0
15 Ke7 0
16 Kd6 0
17 Bb7 0