8
7
6
5
4
3
2
a
1
b
c
d
e
f
g
h
Click on the third or sixth rank to set the en passant target square.

Book: 55 / 193

# move proof disproof
1 g4 11 55
2 Nh6 5 55
3 f5 135 56
4 Nf6 21 56
5 Bg7 3 56
6 d5 1 56
7 b6 1 56
8 c6 1 56
9 e6 1 56
10 f6 1 56
11 a5 1 56
12 c5 1 56
13 Nc6 1 56
14 e5 1 57
15 a6 1 58
16 Na6 1 58
17 h6 1 58
18 b5 1 60
19 h5 2 61
20 d6 2 71
21 Bh6 1 73