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

Book: ∞ / 0

# move proof disproof
1 c5 0
2 Ke6 0
3 Na6 0
4 Ke8 0
5 Kd8 0
6 Ke7 0
7 Kc7 0
8 Kd6 0
9 e4 0
10 a5 0
11 f5 0
12 a6 0
13 f6 0
14 Ba6 0
15 Bb7 0