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

Book: ∞ / 0

# move proof disproof
1 Ke8 0
2 Kd8 0
3 g4 0
4 a5 0
5 Rb8 0
6 a6 0
7 Kc6 0
8 Kd6 0
9 Ke6 0
10 Bb7 0
11 Ke7 0
12 Kc7 0
13 Ba6 0