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

Book: ∞ / 0

# move proof disproof
1 Bf8 0
2 f5 0
3 g4 0
4 Bg7 0
5 Nf6 0
6 f6 0
7 Bb7 0
8 Nc6 0
9 e5 0
10 Ke6 0
11 Kd6 0
12 Ke8 0
13 Kd8 0
14 Kc7 0
15 Kc6 0
16 Ra7 0
17 a5 0
18 e6 0