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

Book: 37 / 270

# move proof disproof
1 Ng4 170 37
2 g4 37 37
3 Nf5 1 38
4 Kc6 1 39
5 Ke6 1 39
6 Ke8 1 39
7 a6 1 47
8 c6 1 47
9 g6 1 47
10 Bb7 1 47
11 Rg8 1 47
12 Qe8 1 47
13 Kd6 2 48
14 Ba6 1 48
15 a5 1 50
16 c5 1 50
17 Na6 1 50
18 Nc6 1 50
19 e5 1 52
20 e6 1 52
21 Nf7 23 55
22 Ng8 21 56