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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 h5 0
3 h6 0
4 a5 0
5 e5 0
6 Nf6 0
7 Bd7 0
8 Nh6 0
9 Ba6 0
10 Bb7 0
11 Rb8 0