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

Book: ∞ / 0

# move proof disproof
1 Ke8 0
2 Kc7 0
3 Kd8 0
4 Bg7 0
5 a6 0
6 Kd6 0
7 a5 0
8 Ba6 0
9 Na6 0
10 e5 0
11 c5 0
12 h5 0
13 Bb7 0