Time: 00:00:00

Sudoku 20x20 num: 249 (Level: hard)

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