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

Book: ∞ / 0

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