Sudoku #h979

Sudoku game, level: Hard #979. This Sudoku have 28 given numbers (clues)..
Structure: 8 (1 pcs.), 1 (2 pcs.), 2 (2 pcs.), 3 (2 pcs.), 9 (3 pcs.), 4 (4 pcs.), 5 (4 pcs.), 6 (5 pcs.), 7 (5 pcs.), ∑28.


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5
3
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7
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5
1
6
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