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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 Rb8 0
3 h5 0
4 Nh6 0
5 g4 0
6 Ke8 0
7 Kd8 0
8 Kc7 0
9 Kd6 0
10 Kc6 0
11 Bb7 0
12 e5 0
13 c4 0
14 e6 0
15 h6 0
16 Bg7 0
17 Ra7 0
18 Ke6 0
19 Bh6 0