Sudoku #h65

Sudoku game, level: Hard #65. This Sudoku have 27 given numbers (clues)..
Structure: 1 (2 pcs.), 5 (2 pcs.), 8 (3 pcs.), 9 (3 pcs.), 7 (3 pcs.), 6 (3 pcs.), 3 (3 pcs.), 2 (3 pcs.), 4 (5 pcs.), ∑27.


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