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

Book: 50 / 239

# move proof disproof
1 Nc6 1 50
2 Kd6 2 51
3 a5 1 51
4 f5 1 51
5 g5 3 52
6 c5 1 52
7 Nf5 1 52
8 Kc6 1 52
9 Ke6 1 52
10 Ke8 1 52
11 e5 1 52
12 e6 1 52
13 c6 23 53
14 a6 20 53
15 Ng4 42 54
16 Bb7 1 67
17 Ba6 2 71
18 Na6 1 73
19 Nf7 25 74
20 g6 23 75
21 Rg8 22 75
22 Qe8 26 383
23 Ng8 39