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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 Bh3 0
3 h5 0
4 Nf6 0
5 Bg4 0
6 c5 0
7 e5 0
8 Rb8 0
9 a5 0
10 e6 0
11 Bf5 0
12 Bd7 0
13 f6 0
14 c6 0
15 a6 0
16 Bg7 0
17 Ba6 0
18 Be6 0
19 Bb7 0
20 g5 0
21 Rh7 0