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

Book: 45 / 122

# move proof disproof
1 Nc3 2 45
2 a4 3 53
3 c3 3 53
4 a3 3 53
5 c4 3 53
6 Na3 3 53
7 Kf1 3 53
8 Qe2 3 53
9 h4 2 53
10 Qg4 1 53
11 Bb2 1 53
12 g4 42 54
13 g3 3 54
14 f4 3 54
15 Rh2 3 54
16 Ba3 1 54
17 Qf3 5 55
18 d4 1 55
19 d3 6 56
20 Qh5 23 61
21 f3 2 65
22 Nf3 1 65
23 e4 2 66
24 Ke2 1 66
25 Ne2 1 66
26 b4 1 70