Sudoku #x642

Sudoku game, level: Expert #642. This Sudoku have 29 given numbers (clues)..
Structure: 2 (2 pcs.), 3 (2 pcs.), 9 (2 pcs.), 4 (3 pcs.), 7 (3 pcs.), 8 (3 pcs.), 6 (4 pcs.), 1 (5 pcs.), 5 (5 pcs.), ∑29.


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