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

Book: ∞ / 0

# move proof disproof
1 f6 0
2 Kc6 0
3 Ke6 0
4 Ke8 0
5 c6 0
6 f5 0
7 Bh6 0
8 Nf6 0
9 a6 0
10 Bg7 0
11 e6 0
12 e5 0
13 Na6 0
14 Nc6 0
15 Bb7 0
16 Kd6 0
17 Qe8 0
18 Nh6 0
19 Ba6 0
20 c5 0
21 a5 0