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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 e5 0
3 e6 0
4 h6 0
5 Ke6 0
6 Qe8 0
7 Bg7 0
8 c5 0
9 c6 0
10 b3 0
11 Bb7 0
12 Ba6 0
13 Nh6 0
14 Kc6 0
15 Kd6 0
16 g4 0
17 h5 0
18 Ke8 0
19 Bh6 0