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

Book: ∞ / 0

# move proof disproof
1 Ke8 0
2 Ke7 0
3 Kc6 0
4 Rb7 0
5 Ke6 0
6 Kd6 0
7 c6 0
8 e4 0
9 Bb7 0
10 Kd8 0
11 Ra8 0
12 c5 0
13 a5 0
14 Nc6 0