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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Bg7 0
3 Kb7 0
4 Kb8 0
5 Kd8 0
6 Rd8 0
7 c5 0
8 Ng8 0
9 Kd7 0
10 Kc7 0
11 Nf5 0
12 Nf7 0
13 Ng4 0
14 a5 0