Sudoku #x219

Sudoku game, level: Expert #219. This Sudoku have 30 given numbers (clues)..
Structure: 1 (2 pcs.), 5 (2 pcs.), 8 (3 pcs.), 7 (3 pcs.), 2 (3 pcs.), 4 (3 pcs.), 9 (3 pcs.), 3 (5 pcs.), 6 (6 pcs.), ∑30.


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