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

Book: ∞ / 0

# move proof disproof
1 f5 0
2 Nf6 0
3 Kd6 0
4 Ke8 0
5 Bg7 0
6 Ke6 0
7 c6 0
8 Na6 0
9 Qe8 0
10 Nc6 0
11 Bb7 0
12 f6 0
13 Ba6 0
14 c5 0
15 e6 0
16 e5 0
17 Kc6 0
18 Nh6 0
19 Bh6 0