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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 e5 0
3 f6 0
4 Rd8 0
5 Ke8 0
6 Kd8 0
7 Kc7 0
8 Rg8 0
9 Ke6 0
10 Bb7 0
11 Nf8 0
12 Nf6 0
13 Ng5 0
14 Nc6 0
15 Ra7 0
16 Rf8 0
17 Re8 0
18 e6 0
19 Kd6 0
20 Kc6 0