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

Book: ∞ / 0

# move proof disproof
1 Nf6 0
2 f6 0
3 Kc6 0
4 e5 0
5 Bg7 0
6 Kc7 0
7 Na6 0
8 e6 0
9 Ke8 0
10 Kd8 0
11 Ba6 0
12 Nc6 0
13 a6 0
14 Re8 0
15 Rd8 0
16 Rg8 0
17 Rh8 0
18 Bb7 0
19 Ke6 0
20 Kd6 0
21 g4 0
22 f5 0
23 a5 0