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

Book: ∞ / 0

# move proof disproof
1 d5 0
2 Nc6 0
3 Bd8 0
4 h5 0
5 Bf8 0
6 f5 0
7 Nd7 0
8 Ra7 0
9 a5 0