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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 Bg7 0
3 Ba6 0
4 Bh6 0
5 a6 0
6 Bd7 0
7 Bb7 0
8 e5 0
9 g5 0
10 Rb8 0