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

Book: 129 / 84

# move proof disproof
1 e5 1 129
2 Bh6 1 129
3 Nb4 30 130
4 Nc5 2 130
5 g4 2 131
6 Nf6 1 131
7 d6 1 132
8 f5 1 132
9 b5 1 134
10 f6 1 134
11 Rb8 2 135
12 h6 2 135
13 c6 2 135
14 b6 2 135
15 Nh6 2 135
16 d5 1 135
17 Nb8 19 136
18 Bg7 7 142
19 c5 4 148
20 e6 2 151