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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 Na6 0
3 Bg7 0
4 e5 0
5 Kd6 0
6 Kc6 0
7 e6 0
8 a6 0
9 Bh6 0
10 Nf6 0
11 Ng5 0
12 Ba6 0
13 Kc7 0
14 Kd8 0
15 Ke8 0
16 Ke6 0
17 Nc6 0
18 a5 0
19 Bb7 0
20 Rg8 0
21 f6 0