Sudoku #m511

Sudoku game, level: Medium #511. This Sudoku have 23 given numbers (clues)..
Structure: 2 (1 pcs.), 3 (2 pcs.), 8 (2 pcs.), 9 (2 pcs.), 1 (3 pcs.), 4 (3 pcs.), 5 (3 pcs.), 6 (3 pcs.), 7 (4 pcs.), ∑23.


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