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

Book: ∞ / 0

# move proof disproof
1 e6 0
2 Ke6 0
3 c5 0
4 e5 0
5 a6 0
6 f5 0
7 Na6 0
8 Ke8 0
9 Kd8 0
10 Kc7 0
11 Kd6 0
12 a5 0
13 Ba6 0
14 Bb7 0