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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 f5 0
3 a5 0
4 Nc6 0
5 Na6 0
6 Nh6 0
7 Bh6 0
8 g5 0
9 Ke6 0
10 Ba6 0
11 Ke8 0
12 Kd8 0
13 Kc7 0
14 Kd6 0
15 Kc6 0
16 e6 0
17 Bb7 0
18 f6 0
19 Nf6 0
20 e5 0
21 Bg7 0