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

Book: 65 / 218

# move proof disproof
1 g4 80 65
2 a5 20 65
3 c5 19 65
4 d5 10 65
5 Bh6 2 65
6 e6 1 65
7 Nc6 1 65
8 d6 1 65
9 e5 1 67
10 h5 9 68
11 Bb7 1 74
12 Nh6 17 78
13 f5 1 80
14 Bg7 1 80
15 f6 17 82
16 h6 16 82
17 c6 20 83
18 Nf6 1 84