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

Book: ∞ / 0

# move proof disproof
1 c4 0
2 a5 0
3 Nd7 0
4 Ng6 0
5 Rb8 0
6 g4 0
7 Nh7 0
8 Rd8 0
9 Re8 0
10 Rc8 0
11 a6 0
12 g6 0
13 Rh8 0