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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 a5 0
3 Bh6 0
4 Nf6 0
5 Ke6 0
6 Rg8 0
7 Kd8 0
8 Ke8 0
9 Na6 0
10 Bg7 0
11 Ba6 0
12 f5 0
13 Kc7 0
14 f6 0
15 Nc6 0
16 g4 0
17 e5 0
18 e6 0
19 Bb7 0
20 Kc6 0
21 Kd6 0