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

Book: 47 / 225

# move proof disproof
1 a4 9 47
2 Qe2 9 47
3 a3 8 47
4 f4 8 47
5 d3 8 47
6 Nc3 8 47
7 Na3 7 47
8 c5 3 47
9 Qg4 1 47
10 d4 1 47
11 g4 37 48
12 b3 16 48
13 Rh2 16 48
14 g3 16 48
15 Kf1 14 48
16 Qa4 2 48
17 h4 24 49
18 Qf3 7 50
19 Qh5 21 51
20 f3 2 56
21 e4 2 57
22 Ke2 1 57
23 Nf3 1 57
24 Ne2 1 57
25 Qc2 1 58
26 b4 1 62
27 Qb3 1 63