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

Book: ∞ / 0

# move proof disproof
1 Nf6 0
2 Na6 0
3 Bg7 0
4 Ba6 0
5 f6 0
6 Bb7 0
7 Ke6 0
8 a5 0
9 a6 0
10 c5 0
11 Nh6 0
12 g4 0
13 f5 0
14 e5 0
15 Kd6 0
16 Kc7 0
17 Kd8 0
18 Ke8 0
19 e6 0
20 Bh6 0