Sudoku #h878

Sudoku game, level: Hard #878. This Sudoku have 29 given numbers (clues)..
Structure: 1 (1 pcs.), 3 (2 pcs.), 5 (2 pcs.), 8 (3 pcs.), 9 (3 pcs.), 7 (3 pcs.), 6 (3 pcs.), 2 (6 pcs.), 4 (6 pcs.), ∑29.


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