Sudoku #x593

Sudoku game, level: Expert #593. This Sudoku have 30 given numbers (clues)..
Structure: 3 (1 pcs.), 8 (1 pcs.), 1 (2 pcs.), 6 (3 pcs.), 5 (4 pcs.), 4 (4 pcs.), 9 (5 pcs.), 7 (5 pcs.), 2 (5 pcs.), ∑30.


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7
2
6
9
5
5
6
9
2
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9
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7
7
9
4
2
7
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8
5
4
9
2
4
7
5
6
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