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

Book: ∞ / 0

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