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

Book: ∞ / 0

# move proof disproof
1 Re8 0
2 Ra8 0
3 g5 0
4 e5 0
5 Rh7 0
6 d5 0
7 Rb7 0
8 h5 0
9 a5 0
10 a6 0
11 Rc8 0
12 g6 0
13 e6 0
14 Rd8 0
15 f5 0