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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 g6 0
3 Bb7 0
4 Na6 0
5 g5 0
6 a6 0
7 Nf6 0
8 Ke8 0
9 Ke6 0
10 Kd6 0
11 Ba6 0
12 a5 0
13 f6 0
14 e6 0
15 c5 0
16 Nh6 0
17 e5 0
18 Kc7 0
19 Kd8 0