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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 c5 0
3 e5 0
4 Ba6 0
5 Bb7 0
6 Nd7 0
7 a5 0
8 Na6 0
9 Bd7 0