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

Book: ∞ / 0

# move proof disproof
1 e4 0
2 Bb7 0
3 Ba6 0
4 c5 0
5 a6 0
6 Ke6 0
7 Na6 0
8 a5 0
9 Kd6 0
10 Kc7 0
11 Ke7 0
12 Kd8 0
13 Ke8 0