Sudoku #h892

Sudoku game, level: Hard #892. This Sudoku have 27 given numbers (clues)..
Structure: 3 (1 pcs.), 7 (2 pcs.), 9 (2 pcs.), 2 (3 pcs.), 4 (3 pcs.), 5 (3 pcs.), 6 (4 pcs.), 8 (4 pcs.), 1 (5 pcs.), ∑27.


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