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

Book: 59 / 254

# move proof disproof
1 g4 103 59
2 Nc6 25 59
3 a5 21 59
4 f6 17 59
5 h5 7 59
6 e6 1 59
7 Bh6 1 59
8 Bg7 1 59
9 c5 20 61
10 d5 1 61
11 e5 1 61
12 d6 1 68
13 Bb7 1 71
14 Nh6 17 75
15 Nf6 1 76
16 f5 1 77
17 h6 16 80
18 c6 19 81