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

Book: 63 / 102

# move proof disproof
1 e5 1 63
2 e6 1 63
3 Ng4 60 64
4 Ke8 2 64
5 c5 1 64
6 a5 1 64
7 Ke6 1 64
8 Na6 1 64
9 a6 4 65
10 Kc6 2 66
11 Nf5 1 66
12 g5 2 71
13 Nf7 2 73
14 f5 2 74
15 Kd6 1 77
16 Rg8 1 80
17 g6 1 80
18 Ba6 1 84
19 Bb7 1 84
20 Nc6 1 87
21 Qe8 5 1174
22 c6 10 2669
23 Ng8 0 ∞