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

Book: ∞ / 0

# move proof disproof
1 Rb8 0
2 f4 0
3 Re8 0
4 e5 0
5 e6 0
6 Nb5 0
7 Bg7 0
8 h5 0
9 Nc8 0
10 Rc8 0
11 Rd8 0
12 Nc6 0