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

Book: ∞ / 0

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