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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 Ra7 0
3 Bh6 0
4 Bb7 0
5 Nh6 0
6 Kc7 0
7 Nc6 0
8 Ke8 0
9 Kd8 0
10 Bg7 0
11 e6 0
12 Ke6 0
13 Kc6 0
14 Kd6 0
15 Nf6 0