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

Book: ∞ / 0

# move proof disproof
1 h4 0
2 Rh6 0
3 Rc6 0
4 Rd6 0
5 Bb7 0
6 Ra8 0
7 Ra7 0
8 Re6 0
9 d5 0
10 d6 0
11 Rf6 0
12 Rb6 0
13 Rg6 0