Sudoku #m591

Sudoku game, level: Medium #591. This Sudoku have 23 given numbers (clues)..
Structure: 7 (1 pcs.), 6 (2 pcs.), 1 (2 pcs.), 5 (2 pcs.), 3 (2 pcs.), 9 (3 pcs.), 8 (3 pcs.), 2 (3 pcs.), 4 (5 pcs.), ∑23.


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