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

Book: ∞ / 0

# move proof disproof
1 Ke6 0
2 a6 0
3 Nh6 0
4 Bb7 0
5 a5 0
6 Ba6 0
7 f5 0
8 Na6 0
9 g5 0
10 Nc6 0
11 g6 0
12 Kc6 0
13 Kd6 0
14 Kc7 0
15 Kd8 0
16 Ke8 0
17 e6 0
18 e5 0