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

Book: ∞ / 0

# move proof disproof
1 c4 0
2 Kd6 0
3 Ke7 0
4 Bh6 0
5 Nc6 0
6 Na6 0
7 g4 0
8 a5 0
9 Bd6 0
10 f5 0
11 Ke6 0
12 Ke8 0
13 Kd8 0
14 Kc8 0
15 Kc7 0
16 Kc6 0
17 Rg8 0
18 a6 0
19 Be7 0
20 Bg7 0