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

Book: ∞ / 0

# move proof disproof
1 Ke7 0
2 e5 0
3 Ke8 0
4 Bb7 0
5 a5 0
6 Kc7 0
7 Kd8 0
8 Ra7 0
9 c5 0
10 Kd6 0