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

Book: ∞ / 0

# move proof disproof
1 Rd8 0
2 Ra8 0
3 g5 0
4 d6 0
5 Rh7 0
6 d5 0
7 a6 0
8 a5 0
9 g6 0
10 e6 0
11 e5 0
12 h5 0
13 Rc8 0
14 Rb8 0
15 f5 0