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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 b5 0
3 Nh6 0
4 Ke6 0
5 e5 0
6 Bg7 0
7 Kd6 0
8 Kc6 0
9 Kc7 0
10 Kd8 0
11 Ke8 0
12 Bb7 0
13 Ba6 0
14 Bh6 0
15 e6 0
16 Na6 0
17 Nc6 0