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

Book: ∞ / 0

# move proof disproof
1 Nf6 0
2 Bb7 0
3 Bf6 0
4 Bf8 0
5 a5 0
6 Na6 0
7 h6 0
8 h5 0
9 Bh6 0
10 Ke6 0
11 Ke8 0
12 Kd8 0
13 Ke7 0
14 Kc7 0
15 Kd6 0
16 Ba6 0
17 e4 0
18 c5 0
19 a6 0
20 Ne7 0
21 Nh6 0