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

Book: ∞ / 0

# move proof disproof
1 Nf8 0
2 Rg8 0
3 Rc8 0
4 Rf8 0
5 Re8 0
6 Kd6 0
7 Kc6 0
8 Nf6 0
9 Nc6 0
10 Kc7 0
11 Ra7 0
12 Rh8 0
13 Ke8 0
14 Kc8 0
15 Ke7 0
16 Ke6 0
17 a5 0