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

Book: 24 / 196

# move proof disproof
1 Nf3 1 24
2 c5 2 44
3 Qg4 67 45
4 Bb2 1 45
5 d3 1 45
6 g3 1 45
7 e4 1 45
8 a4 1 45
9 f4 1 45
10 h4 1 45
11 Na3 1 45
12 Nc3 1 45
13 Nh3 1 45
14 Qe2 1 45
15 Kf1 1 45
16 g4 22 46
17 a3 2 46
18 Qf3 2 46
19 Ne2 26 48
20 Ke2 26 48
21 b4 1 48
22 d4 1 48
23 Ba3 1 48
24 Qc2 1 49
25 h3 8 56
26 Qh5 23 60
27 f3 1 103