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

Book: ∞ / 0

# move proof disproof
1 Ke6 0
2 Ra6 0
3 Ra7 0
4 Bb7 0
5 Na6 0
6 Ba6 0
7 Nc6 0
8 Kc6 0
9 Kd6 0
10 Kc7 0
11 Ke7 0
12 Kd8 0
13 Ke8 0