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

Book: ∞ / 0

# move proof disproof
1 h4 0
2 Rh7 0
3 Rh6 0
4 Nh6 0
5 Ra7 0
6 d6 0
7 Rb8 0
8 Ne7 0
9 Bb7 0
10 Nf6 0
11 d5 0