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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 b4 0
3 Na6 0
4 Kd8 0
5 b6 0
6 e6 0
7 e5 0
8 Nh6 0
9 g6 0
10 h5 0
11 h6 0
12 f6 0
13 f5 0
14 g5 0
15 Nc6 0
16 Nf6 0
17 d6 0
18 d5 0