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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 Nc6 0
3 a5 0
4 Bg7 0
5 Rg8 0
6 Bb7 0
7 Nf6 0
8 Ng5 0
9 Ba6 0
10 Bh6 0
11 c4 0
12 Na6 0
13 a6 0
14 e6 0
15 Kc6 0
16 Kc7 0
17 Kd8 0
18 Ke8 0
19 Kd6 0
20 Ke6 0
21 f6 0
22 e5 0