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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 c6 0
3 h5 0
4 h6 0
5 Nf6 0
6 e4 0
7 Na6 0
8 Nc6 0
9 Ke8 0
10 Nh6 0
11 Kc6 0
12 Kd6 0
13 Kd8 0
14 a5 0
15 Bb7 0
16 c5 0
17 Ne7 0
18 Ke7 0
19 Ke6 0
20 Ba6 0