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

Book: ∞ / 0

# move proof disproof
1 Ra7 0
2 Nd7 0
3 a5 0
4 Nf6 0
5 e6 0
6 e5 0
7 Bg7 0
8 Kd7 0
9 Kd8 0
10 f6 0
11 h5 0
12 f5 0