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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 Ke8 0
3 Bh6 0
4 f5 0
5 Nh6 0
6 Kc7 0
7 f6 0
8 b6 0
9 d5 0
10 d6 0
11 e6 0
12 a6 0
13 Bg7 0
14 e5 0
15 g5 0
16 Nc6 0
17 Na6 0
18 Nf6 0