Sudoku #h972

Sudoku game, level: Hard #972. This Sudoku have 28 given numbers (clues)..
Structure: 1 (0 pcs.), 9 (2 pcs.), 8 (3 pcs.), 2 (3 pcs.), 4 (3 pcs.), 7 (3 pcs.), 5 (4 pcs.), 3 (4 pcs.), 6 (6 pcs.), ∑28.


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