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

Book: ∞ / 0

# move proof disproof
1 c5 0
2 a6 0
3 c6 0
4 Bb7 0
5 Nb8 0
6 Ba6 0
7 Nb6 0
8 Nf8 0
9 Nc5 0
10 Ne5 0
11 a5 0
12 Rb8 0