Sudoku #h52

Sudoku game, level: Hard #52. This Sudoku have 24 given numbers (clues)..
Structure: 6 (1 pcs.), 4 (2 pcs.), 9 (2 pcs.), 1 (3 pcs.), 2 (3 pcs.), 5 (3 pcs.), 7 (3 pcs.), 8 (3 pcs.), 3 (4 pcs.), ∑24.


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