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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Nc6 0
3 Bb7 0
4 Na6 0
5 Ba6 0
6 f5 0
7 Ke6 0
8 a5 0
9 Kd6 0
10 Kc6 0
11 Kc7 0
12 Ke7 0
13 Kd8 0
14 Ke8 0