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

Book: ∞ / 0

# move proof disproof
1 d5 0
2 f5 0
3 e6 0
4 e5 0
5 h5 0
6 f6 0
7 Nd7 0
8 Ra7 0
9 Nc6 0
10 Bg7 0