Time: 00:00:00

Sudoku 20x20 num: 241 (Level: hard)

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