Sudoku #x511

Sudoku game, level: Expert #511. This Sudoku have 27 given numbers (clues)..
Structure: 5 (1 pcs.), 3 (2 pcs.), 7 (2 pcs.), 1 (3 pcs.), 2 (3 pcs.), 6 (3 pcs.), 4 (4 pcs.), 8 (4 pcs.), 9 (5 pcs.), ∑27.


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