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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Kc7 0
3 Kd7 0
4 Kc8 0
5 Bg7 0
6 c5 0
7 Ng8 0
8 Nf5 0
9 Nf7 0
10 Ng4 0
11 a5 0