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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 Rb8 0
3 h5 0
4 Ne7 0
5 Nf6 0
6 d6 0
7 Bb7 0
8 d5 0
9 Ba6 0
10 a6 0