Time: 00:00:00

Sudoku 20x20 num: 294 (Level: hard)

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