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

Book: ∞ / 0

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