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

Book: ∞ / 0

# move proof disproof
1 c6 0
2 c5 0
3 e5 0
4 Bb7 0
5 Na6 0
6 a5 0
7 Nc6 0
8 Ba6 0
9 Nd7 0
10 a6 0
11 Bd7 0