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

Book: ∞ / 0

# move proof disproof
1 e5 0
2 a5 0
3 e6 0
4 Kc6 0
5 Bb7 0
6 Nc6 0
7 Ra7 0
8 g6 0
9 Nh6 0
10 Nf6 0
11 Ke6 0
12 f6 0
13 f5 0
14 g5 0
15 Ke8 0
16 Kd8 0
17 Kc7 0
18 Kd6 0