Sudoku #x409

Sudoku game, level: Expert #409. This Sudoku have 26 given numbers (clues)..
Structure: 1 (2 pcs.), 2 (2 pcs.), 4 (2 pcs.), 6 (2 pcs.), 8 (2 pcs.), 3 (4 pcs.), 5 (4 pcs.), 7 (4 pcs.), 9 (4 pcs.), ∑26.


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2
5
3
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9
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6
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7
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6
9
3
5
9
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3
1
7
8
7
9
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