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

Book: 56 / 196

# move proof disproof
1 a6 20 56
2 g5 3 56
3 Nf5 1 56
4 Ng4 64 57
5 Ng8 21 58
6 Bb7 1 58
7 Nf7 25 59
8 a5 1 61
9 c5 1 61
10 Kd6 1 62
11 e6 1 62
12 Kc6 1 62
13 Ke6 1 62
14 Ke8 1 62
15 Ba6 1 62
16 Nc6 1 62
17 e5 1 63
18 f5 2 75
19 Qe8 1 76
20 g6 1 76
21 Rg8 22 82
22 Na6 1 118
23 c6 24 203