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

Book: 52 / 148

# move proof disproof
1 f5 1 52
2 Nc6 1 54
3 Kd6 1 58
4 Ke6 1 58
5 c5 1 58
6 e5 1 58
7 e6 1 58
8 Ng4 59 59
9 Nf5 2 59
10 Kc6 2 59
11 Ke8 2 59
12 Ba6 1 63
13 Qe8 1 71
14 Rg8 1 71
15 g6 1 71
16 a6 1 71
17 g5 22 72
18 Bb7 1 77
19 Nf7 24 78
20 Na6 1 78
21 Ng8 21 81
22 a5 1 81
23 c6 1 91