Sudoku #m336

Sudoku game, level: Medium #336. This Sudoku have 23 given numbers (clues)..
Structure: 5 (1 pcs.), 9 (2 pcs.), 8 (2 pcs.), 4 (2 pcs.), 3 (2 pcs.), 7 (3 pcs.), 6 (3 pcs.), 1 (4 pcs.), 2 (4 pcs.), ∑23.


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