Easy Sudoku

4 8 3 5 9 1 6 2 7
6 5 7 3 2 4 1 9 8
2 1 7 8 6 5 4 3
3 5 8 7 6
7 6 3 5
9 6 7 5
5 6 4 8 7 9
9 3 1 5 2 7 6 4
7 1 2 6 4 3 8 5 9
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Medium Sudoku

2 6 1 9 4 3 8
8 4 1 2 6
5 6 8 2 1
3 6 9 2
4 9 1
6 9 1 5
7 4 2 3 9 6 1 8 5
3 1 5 2 7 4 9
9 5 6 8 4 1 2 7 3
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Hard Sudoku

1 8 7 5 4 2 3
6 8 4 5
5 7
1 2 3
3 9 4 5 7
5 2 6 9 8
3 8 2
6 3 2 4 8 5 9 7 1
9 7 8 5 6 4
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Very Hard Sudoku

7 1
3 2 6 5 7
7 5 1 4
5
7 9 4
6 3 5 8 9 1 4
1 8 7 4 2 3 6 5 9
2 4 9 6
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Insane Sudoku

4 6
8 9
7 9 2
3 2
2 3
6 3 1
2
7 1 4
4 8 5 6 3 1 9 7
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