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

Book: 65 / 129

# move proof disproof
1 Ng4 81 65
2 e5 1 65
3 e6 1 65
4 Ke6 1 65
5 Kc6 2 66
6 Ba6 1 66
7 g5 1 67
8 Ke8 2 68
9 Kd6 1 68
10 Nf7 2 71
11 Ng8 1 71
12 Bb7 1 73
13 Qe8 1 73
14 Rg8 1 73
15 g6 1 73
16 Na6 1 74
17 Nc6 1 75
18 Nf5 2 77
19 a5 1 77
20 c5 1 80
21 c6 1 92
22 a6 1 112
23 f5 23 311