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

Book: 51 / 213

# move proof disproof
1 f6 1 51
2 e5 1 51
3 a5 1 51
4 c5 1 51
5 g4 83 52
6 f5 75 52
7 d5 8 52
8 Nc6 1 52
9 d6 1 52
10 Bg7 1 52
11 c6 18 53
12 h6 15 53
13 Nf6 1 53
14 e6 1 53
15 Bh6 1 54
16 h5 2 70
17 Nh6 1 70
18 Bb7 1 74