Sudoku #h591

Sudoku game, level: Hard #591. This Sudoku have 30 given numbers (clues)..
Structure: 8 (1 pcs.), 1 (2 pcs.), 4 (2 pcs.), 2 (3 pcs.), 5 (3 pcs.), 6 (3 pcs.), 9 (4 pcs.), 7 (5 pcs.), 3 (7 pcs.), ∑30.


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8
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1
9
6
2
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