Sudoku #x529

Sudoku game, level: Expert #529. This Sudoku have 28 given numbers (clues)..
Structure: 4 (2 pcs.), 3 (2 pcs.), 9 (2 pcs.), 1 (3 pcs.), 5 (3 pcs.), 2 (3 pcs.), 8 (4 pcs.), 6 (4 pcs.), 7 (5 pcs.), ∑28.


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7
6
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7
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4
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4
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8
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7
3
8
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