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

Book: ∞ / 0

# move proof disproof
1 b4 0
2 Nc6 0
3 h5 0
4 d6 0
5 Rh7 0
6 Kf7 0
7 Kd8 0
8 g6 0
9 Nf6 0
10 e5 0
11 a6 0
12 Na6 0
13 d5 0
14 e6 0
15 b6 0