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

Book: ∞ / 0

# move proof disproof
1 b6 0
2 Na6 0
3 Nc6 0
4 f6 0
5 g5 0
6 Kd8 0
7 Rh7 0
8 d5 0
9 a6 0
10 f5 0
11 Nf6 0
12 g6 0
13 a5 0
14 e5 0
15 d6 0
16 e6 0
17 h5 0