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

Book: ∞ / 0

# move proof disproof
1 Rf8 0
2 c6 0
3 a6 0
4 Rg8 0
5 Re8 0
6 c5 0
7 a5 0
8 Rd8 0
9 Rb8 0
10 e4 0
11 Rh8 0
12 Rc8 0