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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 f5 0
3 e5 0
4 Kd6 0
5 Kc6 0
6 e6 0
7 f6 0
8 Kc7 0
9 Kd8 0
10 Ke8 0
11 Bh6 0
12 Ke6 0
13 Bg7 0
14 Ra7 0
15 Nc6 0
16 Rg8 0
17 Bb7 0
18 g4 0
19 Nf6 0