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

Book: ∞ / 0

# move proof disproof
1 e2 0
2 f4 0
3 c5 0
4 a6 0
5 Ba6 0
6 Nc6 0
7 Na6 0
8 c6 0
9 Ke6 0
10 a5 0
11 Kc6 0
12 Kd6 0
13 Ke7 0
14 Kd8 0
15 Ke8 0
16 Bb7 0