Time: 00:00:00

Sudoku 20x20 num: 285 (Level: hard)

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