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

Book: ∞ / 0

# move proof disproof
1 Rg8 0
2 Re8 0
3 Rc8 0
4 Nd7 0
5 Na6 0
6 g4 0
7 Rf8 0
8 a6 0
9 a5 0
10 Rd8 0
11 Nf8 0
12 Nc6 0
13 Nf6 0