Sudoku #x819

Sudoku game, level: Expert #819. This Sudoku have 28 given numbers (clues)..
Structure: 9 (1 pcs.), 2 (2 pcs.), 1 (3 pcs.), 3 (3 pcs.), 4 (3 pcs.), 6 (3 pcs.), 5 (4 pcs.), 8 (4 pcs.), 7 (5 pcs.), ∑28.


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8
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9
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3
1
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