Time: 00:00:00

Sudoku 20x20 num: 204 (Level: hard)

2
A
7
6
J
1
B
9
6
3
H
4
9
J
4
1
B
3
H
C
8
5
G
F
7
C
A
H
3
2
8
J
I
4
1
5
E
D
H
A
7
1
J
K
I
4
1
9
B
A
G
C
8
H
2
3
E
7
K
6
9
5
1
D
7
K
2
B
9
F
4
F
I
1
A
3
J
6
I
E
7
2
K
J
8
F
B
7
3
9
8
4
F
G
6
4
G
B
5
H
C
7
5
G
2
D
8
3
7
H
C
2
1
5
8
E
9
4
B
F
2
B
J
C
2
K
A
5
8
E
3
1
G
6
4
K
J
1
5
8