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

Book: ∞ / 0

# move proof disproof
1 Ra7 0
2 Ke8 0
3 Kd8 0
4 Kc7 0
5 Ke6 0
6 Ke7 0
7 Bb7 0
8 c5 0
9 a5 0
10 Kd6 0