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

Book: 26 / 572

# move proof disproof
1 g4 75 26
2 e5 275 27
3 c5 207 27
4 h5 1 27
5 d5 1 29
6 Bg7 1 30
7 Bh6 1 30
8 Bb7 1 30
9 Nh6 1 30
10 Nf6 1 30
11 Nc6 1 30
12 f5 1 30
13 h6 1 30
14 f6 1 30
15 e6 1 30
16 d6 1 30
17 c6 1 30
18 a5 1 30