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

Book: ∞ / 0

# move proof disproof
1 c3 0
2 e6 0
3 d5 0
4 f5 0
5 e5 0
6 h6 0
7 Na6 0
8 h5 0
9 Nc6 0
10 Bb7 0
11 Ba6 0
12 Kd8 0
13 Kf7 0
14 g6 0
15 Nh6 0
16 b5 0
17 d6 0
18 g5 0