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

Book: ∞ / 0

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