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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 c6 0
3 d5 0
4 Nf6 0
5 f6 0
6 e4 0
7 Nc6 0
8 h5 0
9 Nh6 0
10 c5 0
11 f5 0
12 d6 0
13 g5 0
14 g6 0
15 h6 0
16 Kf8 0
17 Ne7 0
18 Ke7 0
19 Kd8 0
20 Bb7 0