Sudoku #x491

Sudoku game, level: Expert #491. This Sudoku have 28 given numbers (clues)..
Structure: 7 (1 pcs.), 1 (1 pcs.), 3 (2 pcs.), 2 (3 pcs.), 6 (3 pcs.), 9 (3 pcs.), 8 (4 pcs.), 4 (5 pcs.), 5 (6 pcs.), ∑28.


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