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

Book: ∞ / 0

# move proof disproof
1 g4 0
2 Nf6 0
3 Nh6 0
4 Bb7 0
5 h5 0
6 Bd7 0
7 e5 0
8 h6 0
9 a5 0
10 Kf7 0
11 Ra7 0
12 Rb8 0
13 Kh6 0
14 Kg6 0
15 Kf6 0