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 c5 0
4 Rac8 0
5 Rad8 0
6 a5 0
7 Red8 0
8 Rg8 0
9 Rec8 0
10 Rh8 0
11 e6 0
12 c6 0
13 h4 0
14 Nf8 0
15 Rab8 0
16 Reb8 0
17 g4 0
18 Nf6 0