Sudoku #h449

Sudoku game, level: Hard #449. This Sudoku have 28 given numbers (clues)..
Structure: 7 (1 pcs.), 1 (2 pcs.), 5 (2 pcs.), 9 (3 pcs.), 6 (3 pcs.), 3 (3 pcs.), 8 (4 pcs.), 2 (5 pcs.), 4 (5 pcs.), ∑28.


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