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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 Ng5 0
3 f5 0
4 a6 0
5 Nf6 0
6 d5 0
7 e6 0
8 Kd8 0
9 Rg8 0
10 g6 0
11 f6 0
12 b6 0
13 g5 0
14 e5 0
15 Nc6 0
16 Na6 0
17 d6 0