Sudoku #m518

Sudoku game, level: Medium #518. This Sudoku have 26 given numbers (clues)..
Structure: 6 (1 pcs.), 4 (2 pcs.), 5 (2 pcs.), 7 (3 pcs.), 8 (3 pcs.), 9 (3 pcs.), 1 (4 pcs.), 2 (4 pcs.), 3 (4 pcs.), ∑26.


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