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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 Ndf6 0
3 f6 0
4 Bb7 0
5 g5 0
6 g6 0
7 Rb8 0
8 Ngf6 0
9 Ba6 0
10 a6 0
11 Nb8 0
12 Ne5 0
13 a5 0
14 e6 0
15 e5 0
16 Nh6 0
17 Nc5 0
18 Nb6 0