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

Book: 10 / 1267

# move proof disproof
1 f5 726 10
2 h5 117 10
3 Nf6 75 10
4 Nh6 71 10
5 d5 54 10
6 d6 52 10
7 Bg7 24 10
8 Nc6 64 23
9 c5 27 23
10 c6 26 23
11 a5 23 23
12 Bb7 2 23
13 g4 1 24
14 Bh6 1 25
15 h6 1 25
16 f6 1 25
17 e6 1 25
18 e5 1 26