Sudoku #h93

Sudoku game, level: Hard #93. This Sudoku have 28 given numbers (clues)..
Structure: 2 (2 pcs.), 4 (2 pcs.), 7 (2 pcs.), 1 (3 pcs.), 5 (3 pcs.), 6 (3 pcs.), 8 (3 pcs.), 9 (4 pcs.), 3 (6 pcs.), ∑28.


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