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

Book: 13 / 1542

# move proof disproof
1 b4 992 13
2 g4 1 39
3 h3 2 40
4 a3 1 40
5 b3 1 40
6 c3 1 40
7 d3 1 40
8 f3 1 40
9 g3 1 40
10 e4 1 40
11 a4 1 40
12 c4 1 40
13 d4 1 40
14 Na3 1 40
15 Nc3 1 40
16 Nf3 1 40
17 Nh3 1 40
18 Qe2 1 40
19 Kf1 1 40
20 Qf3 158 46
21 f4 1 48
22 Qh5 129 84
23 h4 64 179
24 Qg4 49 181
25 Ne2 57 182
26 Ke2 73 190