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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 f6 0
3 Bg7 0
4 Ba6 0
5 Nf6 0
6 Nc6 0
7 Na6 0
8 Ke6 0
9 Nh6 0
10 Kc6 0
11 e6 0
12 e5 0
13 Bb7 0
14 Ke8 0
15 Kd8 0
16 Kc7 0
17 Kd6 0
18 a6 0
19 Bh6 0
20 a5 0