Sudoku #h764

Sudoku game, level: Hard #764. This Sudoku have 28 given numbers (clues)..
Structure: 8 (1 pcs.), 1 (2 pcs.), 9 (2 pcs.), 2 (3 pcs.), 7 (3 pcs.), 3 (4 pcs.), 4 (4 pcs.), 6 (4 pcs.), 5 (5 pcs.), ∑28.


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9
3
5
7
1
8
3
2
5
6
3
5
2
7
9
1
4
6
5
4
7
6
4
2
5
3
6
4
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