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

Book: ∞ / 0

# move proof disproof
1 Ke7 0
2 Kd8 0
3 Ra7 0
4 Ke6 0
5 Rd8 0
6 e4 0
7 Ke8 0
8 Kc7 0
9 Rf8 0
10 Nf8 0
11 Kd6 0
12 Kc6 0
13 Ng5 0
14 Rg8 0
15 Nf6 0
16 Nc6 0
17 Re8 0
18 Bb7 0