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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Rf8 0
3 g6 0
4 Rc8 0
5 Nb7 0
6 Nf7 0
7 Rb8 0
8 h5 0
9 Re8 0
10 Rh8 0
11 g5 0
12 a5 0
13 h6 0