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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 Na6 0
3 a6 0
4 Nd7 0
5 Be7 0
6 d5 0
7 Bg7 0
8 c4 0
9 h5 0
10 f5 0
11 Nc6 0