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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 Nf6 0
3 e5 0
4 Bb7 0
5 Kc6 0
6 Bg7 0
7 Kc7 0
8 Kd8 0
9 Ke8 0
10 e6 0
11 Nc6 0
12 f5 0
13 f6 0
14 Ra7 0
15 Ke6 0
16 Kd6 0
17 g4 0
18 Bh6 0
19 Nh6 0