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

Book: ∞ / 0

# move proof disproof
1 Rf8 0
2 Rab8 0
3 Ng5 0
4 e6 0
5 g5 0
6 Nf8 0
7 a5 0
8 g6 0
9 Rh8 0
10 Rg8 0
11 Rec8 0
12 Rac8 0
13 h4 0
14 c4 0
15 Reb8 0
16 Nf6 0
17 Rad8 0
18 Red8 0
19 a6 0