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

Book: 10 / 1228

# move proof disproof
1 f5 751 10
2 Nf6 75 10
3 Nh6 71 10
4 d5 54 10
5 d6 52 10
6 Bg7 24 10
7 g4 34 11
8 h5 20 19
9 Nc6 64 23
10 c5 27 23
11 c6 26 23
12 a5 23 23
13 Bb7 2 23
14 Bh6 1 25
15 e5 1 25
16 h6 1 25
17 f6 1 25
18 e6 1 25