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

Book: ∞ / 0

# move proof disproof
1 c4 0
2 e5 0
3 Nc6 0
4 Rg8 0
5 Bh6 0
6 Nf6 0
7 Ba6 0
8 Be7 0
9 Bd6 0
10 a6 0
11 Kc6 0
12 Kc7 0
13 Ke7 0
14 Kd8 0
15 Ke8 0
16 Bb7 0
17 Bg7 0
18 Kd6 0
19 Na6 0
20 a5 0