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

Book: ∞ / 0

# move proof disproof
1 e6 0
2 c1=N 0
3 a5 0
4 c1=K 0
5 e5 0
6 Kd8 0
7 Kf7 0
8 Bg7 0
9 b6 0
10 c1=B 0
11 c1=Q 0
12 c1=R 0
13 f5 0
14 a6 0
15 b5 0
16 d6 0
17 d5 0
18 Na6 0
19 h5 0
20 Nc6 0