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

Book: ∞ / 0

# move proof disproof
1 Kc7 0
2 Kc6 0
3 Ke8 0
4 Kd8 0
5 Bg7 0
6 a6 0
7 Kd6 0
8 a5 0
9 Na6 0
10 Bh6 0
11 Ng5 0
12 Nf6 0
13 Nc6 0
14 Bb7 0
15 Ba6 0
16 e6 0
17 Ke6 0
18 e5 0