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

Book: ∞ / 0

# move proof disproof
1 Rb8 0
2 Ne5 0
3 Nb6 0
4 Kd8 0
5 Kf8 0
6 Ke7 0
7 f6 0
8 a6 0
9 Bb7 0
10 Nf6 0
11 Nb8 0
12 Nf8 0
13 Ba6 0
14 a5 0