Time: 00:00:00

Sudoku 25x25 num: 539 (Level: hard)

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