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

Book: ∞ / 0

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