Sudoku #m534

Sudoku game, level: Medium #534. This Sudoku have 23 given numbers (clues)..
Structure: 9 (1 pcs.), 3 (2 pcs.), 5 (2 pcs.), 6 (2 pcs.), 1 (3 pcs.), 2 (3 pcs.), 4 (3 pcs.), 8 (3 pcs.), 7 (4 pcs.), ∑23.


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