Sudoku 25x25 num: 536 (Level: hard)
5
O
E
J
N
D
M
3
A
C
9
G
H
O
N
D
M
B
A
4
C
G
7
F
P
6
B
2
I
L
A
C
G
F
K
6
D
L
1
A
4
C
9
K
6
J
D
M
8
9
H
F
K
5
E
N
M
L
1
A
4
K
5
E
D
M
2
I
3
1
A
4
C
8
9
G
F
E
J
M
I
L
A
4
C
8
K
5
P
6
A
4
C
8
G
7
H
K
5
6
E
N
M
4
C
7
F
5
P
6
J
B
2
I
3
L
9
G
7
F
5
P
6
O
J
N
M
8
6
J
N
L
1
8
9
G
7
H
J
N
2
L
1
A
4
8
9
G
7
K
5
P
I
3
1
4
8
9
K
6
J
N
D
B
A
4
8
9
F
K
N
M
B
I
1
K
5
O
J
N
D
B
3
L
4
8
6
J
N
B
2
I
3
L
A
4
C
K
D
B
2
L
8
9
G
7
H
K
5
P
6
O
E
3
1
A
C
8
9
H
F
5
P
6
N
D
4
8
7
F
K
5
D
B
2
I
A
7
H
K
N
D
I
A
G
N
D
M
B
I
3
1
A
C
8
7
H
M
B
2
L
1
C
8
O
E
J
N
L
1
4
C
9
7
F
K
5
6
E
D
M
B
2
I
C
8
9
K
6
E
J
B
2
I
1
A
K
6
E
J
N
L
A
G
7
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
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