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

Book: ∞ / 0

# move proof disproof
1 d6 0
2 Ne7 0
3 e5 0
4 Ra7 0
5 Nf6 0
6 Nh6 0
7 Bb7 0
8 d5 0
9 Rb8 0