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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Ng4 0
3 Nf7 0
4 Nf5 0
5 g5 0
6 Kc6 0
7 g6 0
8 Kc7 0
9 Kc8 0
10 Kd8 0
11 Ke8 0
12 a4 0
13 Rh8 0
14 Nc6 0
15 Kd6 0
16 e5 0
17 Na6 0