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

Book: ∞ / 0

# move proof disproof
1 Rg8 0
2 Ra7 0
3 Rh8 0
4 e5 0
5 g5 0
6 Re8 0
7 d6 0
8 Rb8 0
9 Bb7 0
10 d5 0
11 Rf8 0