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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 g4 0
3 Bg7 0
4 e6 0
5 e5 0
6 Kc6 0
7 Kd6 0
8 Kc7 0
9 Kd8 0
10 Ke8 0
11 Nc6 0
12 Ke6 0
13 Bh6 0
14 Na6 0
15 a6 0
16 Bb7 0
17 Ba6 0
18 Nh6 0