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

Book: 50 / 220

# move proof disproof
1 Nc6 1 50
2 Ng8 21 52
3 Kd6 32 54
4 c6 3 54
5 g5 3 54
6 e6 1 54
7 e5 1 54
8 c5 1 54
9 Ke6 1 54
10 Qe8 26 55
11 a6 20 55
12 Kc6 1 56
13 Ke8 1 56
14 Bb7 1 64
15 Ba6 2 71
16 g6 7 72
17 Na6 1 73
18 a5 1 74
19 Ng4 42 75
20 Nf5 6 75
21 Nf7 25 76
22 f5 1 76
23 Rg8 22 79