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

Book: 70 / 104

# move proof disproof
1 Ng4 34 70
2 f5 2 70
3 Kc6 1 70
4 Ke8 1 70
5 Ke6 1 71
6 e6 1 71
7 e5 1 72
8 Nf5 2 73
9 Na6 1 73
10 Kd6 2 74
11 a5 1 74
12 Qe8 1 74
13 Rg8 1 74
14 g6 1 74
15 a6 1 74
16 Nc6 1 75
17 Ba6 1 75
18 Nf7 2 76
19 Ng8 1 77
20 g5 22 78
21 c5 1 78
22 Bb7 1 85
23 c6 24 363