Sudoku #h107

Sudoku game, level: Hard #107. This Sudoku have 28 given numbers (clues)..
Structure: 1 (1 pcs.), 2 (2 pcs.), 6 (2 pcs.), 4 (3 pcs.), 9 (3 pcs.), 3 (4 pcs.), 5 (4 pcs.), 7 (4 pcs.), 8 (5 pcs.), ∑28.


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