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

Book: 57 / 243

# move proof disproof
1 c5 25 57
2 a5 23 57
3 f5 23 57
4 c6 47 58
5 Nh6 41 58
6 Nf6 24 58
7 Bg7 19 59
8 Nc6 4 59
9 Bb7 2 59
10 e5 3 61
11 d6 1 63
12 e6 2 64
13 f6 16 66
14 Bh6 4 68
15 h6 4 70
16 h5 4 71
17 d5 1 71