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

Book: ∞ / 0

# move proof disproof
1 Nf5 0
2 Ng8 0
3 Nd7 0
4 a5 0
5 e6 0
6 Ra7 0
7 Nc6 0
8 Ng4 0
9 e5 0
10 d5 0
11 Nf7 0