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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Ke6 0
3 Bg7 0
4 e6 0
5 Kc6 0
6 Kd8 0
7 Ke8 0
8 a5 0
9 Rb8 0
10 Bh6 0
11 c6 0
12 Bb7 0
13 c5 0
14 Ba6 0
15 Nh6 0
16 Kd6 0
17 Nf6 0