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

Book: ∞ / 0

# move proof disproof
1 a5 0
2 f5 0
3 Kd5 0
4 Kd7 0
5 c6 0
6 a6 0
7 Kd6 0
8 Ke7 0
9 Kf7 0
10 c5 0
11 Kf5 0
12 Na6 0
13 Nc6 0
14 Nd7 0
15 Bd7 0
16 e4 0
17 Bb7 0
18 Ba6 0