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

Book: ∞ / 0

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