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 Rg8 0
4 e6 0
5 Na6 0
6 Bh6 0
7 Kd8 0
8 Ke8 0
9 Kc7 0
10 Kc6 0
11 Nf6 0
12 Nc6 0
13 Ra6 0
14 Ra7 0
15 Ke6 0
16 Kd6 0
17 Bb7 0
18 f6 0
19 g4 0
20 Bg7 0
21 Ba6 0