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

Book: ∞ / 0

# move proof disproof
1 c5 0
2 Bb7 0
3 Ra7 0
4 Ke8 0
5 Kd8 0
6 Ke7 0
7 Kc7 0
8 Ke6 0
9 g5 0
10 Kd6 0
11 a5 0