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

Book: ∞ / 0

# move proof disproof
1 f6 0
2 Rc8 0
3 g4 0
4 a5 0
5 Nf6 0
6 h5 0
7 a6 0
8 b6 0
9 d6 0
10 Ra8 0
11 Rd8 0
12 Rh7 0
13 Kd8 0
14 e5 0
15 f5 0
16 Bg7 0
17 e6 0
18 d5 0