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

Book: ∞ / 0

# move proof disproof
1 a6 0
2 Rg8 0
3 e6 0
4 e5 0
5 g4 0
6 Nf8 0
7 Kc7 0
8 Kc6 0
9 Na6 0
10 Ke6 0
11 Re8 0
12 Nf6 0
13 Kd6 0
14 Kd8 0
15 Ke8 0
16 Nc6 0
17 Bf8 0
18 Rf8 0
19 Bg7 0
20 Ba6 0
21 Rd8 0
22 Bb7 0