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

Book: ∞ / 0

# move proof disproof
1 a4 0
2 d6 0
3 Ba6 0
4 f5 0
5 Nc6 0
6 Nh6 0
7 g6 0
8 h5 0
9 Na6 0
10 Kd8 0
11 g5 0
12 e6 0
13 d5 0
14 e5 0
15 Bb7 0
16 h6 0
17 Kf7 0