Sudoku #m60

Sudoku game, level: Medium #60. This Sudoku have 23 given numbers (clues)..
Structure: 5 (1 pcs.), 1 (2 pcs.), 4 (2 pcs.), 7 (2 pcs.), 9 (2 pcs.), 6 (3 pcs.), 8 (3 pcs.), 2 (4 pcs.), 3 (4 pcs.), ∑23.


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