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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 a6 0
3 e5 0
4 Nf6 0
5 Bh6 0
6 h6 0
7 Bb7 0
8 Nh6 0
9 Bg7 0
10 Bd7 0
11 h5 0
12 Ba6 0
13 Rb8 0