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

Book: 66 / 109

# move proof disproof
1 g4 17 66
2 Qa4 6 66
3 Nc3 3 66
4 Rh2 3 66
5 Qe2 3 66
6 Kf1 3 66
7 a4 3 66
8 d3 3 66
9 b3 3 66
10 e4 2 66
11 f3 2 66
12 Qg4 1 66
13 d4 1 66
14 Qh5 10 67
15 f4 2 67
16 Nf3 1 67
17 c5 3 68
18 Na3 3 68
19 a3 3 68
20 Ke2 1 68
21 Ne2 1 68
22 Qc2 1 68
23 b4 2 71
24 g3 3 72
25 Qf3 22 75
26 h4 4 75
27 Qb3 3 75