Sudoku #m57

Sudoku game, level: Medium #57. This Sudoku have 24 given numbers (clues)..
Structure: 3 (1 pcs.), 6 (2 pcs.), 7 (2 pcs.), 8 (2 pcs.), 1 (3 pcs.), 2 (3 pcs.), 5 (3 pcs.), 9 (3 pcs.), 4 (5 pcs.), ∑24.


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