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

Book: ∞ / 0

# move proof disproof
1 Bf8 0
2 Re8 0
3 Rf8 0
4 Bg7 0
5 Rc8 0
6 Rb8 0
7 Rd8 0
8 g4 0
9 Nf6 0
10 a6 0
11 a5 0