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

Book: 24 / 182

# move proof disproof
1 Nf3 1 24
2 d3 1 45
3 g3 1 45
4 a4 1 45
5 e4 1 45
6 h4 1 45
7 Nc3 1 45
8 Nh3 1 45
9 Ra2 1 45
10 Qe2 1 45
11 Kf1 1 45
12 Qg4 58 46
13 Qa4 5 46
14 b3 2 46
15 c5 2 46
16 f4 1 46
17 Ke2 26 47
18 g4 20 47
19 Qf3 2 47
20 Ne2 26 48
21 b4 1 48
22 d4 1 48
23 Qc2 1 51
24 Qb3 1 55
25 h3 3 56
26 Qh5 21 62
27 f3 1 105