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

Book: ∞ / 0

# move proof disproof
1 Nf6 0
2 Bh6 0
3 e5 0
4 c5 0
5 e6 0
6 Na6 0
7 Kd6 0
8 Kc7 0
9 Kd8 0
10 Ke8 0
11 Bg7 0
12 Rg8 0
13 a6 0
14 Ng5 0
15 f6 0
16 Ke6 0
17 f5 0
18 Bb7 0
19 Ba6 0
20 a5 0