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

Book: 43 / 107

# move proof disproof
1 Na3 2 43
2 Nc3 2 43
3 g4 23 66
4 c4 3 66
5 d3 3 66
6 f4 2 66
7 d4 1 66
8 Nf3 1 66
9 Qh5 10 67
10 a3 3 67
11 Qe2 3 67
12 Ba3 1 67
13 Qg4 1 67
14 Ke2 1 68
15 Ne2 1 68
16 Bb2 1 69
17 Rh2 3 70
18 a4 3 70
19 c3 3 70
20 g3 3 70
21 b4 2 71
22 Kf1 3 72
23 h4 4 73
24 Qf3 24 79
25 f3 2 82
26 e4 2 84