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

Book: ∞ / 0

# move proof disproof
1 b4 0
2 Nf5 0
3 e5 0
4 e6 0
5 Bf5 0
6 Nb4 0
7 Ng8 0
8 Kd7 0
9 Nc5 0
10 Nb8 0
11 Kd8 0
12 Rb8 0
13 f6 0
14 b6 0
15 f5 0
16 Bg7 0
17 Nc7 0
18 Bd7 0
19 Be6 0