Sudoku #h173

Sudoku game, level: Hard #173. This Sudoku have 28 given numbers (clues)..
Structure: 7 (1 pcs.), 1 (2 pcs.), 3 (2 pcs.), 4 (2 pcs.), 5 (4 pcs.), 6 (4 pcs.), 8 (4 pcs.), 9 (4 pcs.), 2 (5 pcs.), ∑28.


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6
1
8
9
2
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8
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8
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6
2
9
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9
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9
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1
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