Time: 00:00:00

Sudoku 20x20 num: 217 (Level: hard)

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