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

Book: ∞ / 0

# move proof disproof
1 Ra8 0
2 Re8 0
3 Rd8 0
4 e5 0
5 d6 0
6 d5 0
7 h5 0
8 Bb7 0
9 Rf8 0
10 Rg8 0
11 Rc7 0
12 Rb7 0