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

Book: ∞ / 0

# move proof disproof
1 Ra7 0
2 c4 0
3 f5 0
4 h5 0
5 Rb8 0
6 Kc6 0
7 Kd6 0
8 Kc7 0
9 Kd8 0
10 Ke8 0
11 Ke6 0
12 Ra6 0
13 g6 0
14 g5 0
15 h6 0
16 Nh6 0
17 e6 0
18 e5 0
19 Ba6 0
20 Bb7 0