Sudoku #h753

Sudoku game, level: Hard #753. This Sudoku have 29 given numbers (clues)..
Structure: 4 (1 pcs.), 2 (2 pcs.), 3 (2 pcs.), 7 (3 pcs.), 9 (3 pcs.), 1 (4 pcs.), 8 (4 pcs.), 5 (5 pcs.), 6 (5 pcs.), ∑29.


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