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

Book: 138 / 1938

# move proof disproof
1 Ba6 1410 138
2 Qg4 138 138
3 Ke2 45 138
4 g4 28 138
5 Qf3 19 138
6 Nc3 19 138
7 Qe2 3 138
8 f3 1 138
9 Na3 17 139
10 a4 9 139
11 h3 7 139
12 a3 4 139
13 g3 4 139
14 f4 1 139
15 Qh5 59 140
16 c3 4 140
17 b3 4 140
18 Nh3 2 140
19 b4 1 140
20 h4 2 141
21 Bd3 5 142
22 d4 1 142
23 Ne2 48 145
24 d3 50 146
25 Be2 1 148
26 Nf3 2 150
27 e4 1 152
28 c4 1 153
29 Bc4 26 156
30 Bb5 26 157