Sudoku #x707

Sudoku game, level: Expert #707. This Sudoku have 27 given numbers (clues)..
Structure: 6 (2 pcs.), 7 (2 pcs.), 1 (2 pcs.), 5 (2 pcs.), 2 (2 pcs.), 9 (4 pcs.), 8 (4 pcs.), 4 (4 pcs.), 3 (5 pcs.), ∑27.


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