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

Book: ∞ / 0

# move proof disproof
1 Ke7 0
2 Kc6 0
3 Kd8 0
4 Nc6 0
5 c5 0
6 Na6 0
7 a6 0
8 h3 0
9 Ba6 0
10 Ke8 0
11 Ke6 0
12 c6 0
13 a5 0
14 Bb7 0
15 Kd6 0