Sudoku #h42

Sudoku game, level: Hard #42. This Sudoku have 24 given numbers (clues)..
Structure: 9 (1 pcs.), 4 (2 pcs.), 5 (2 pcs.), 2 (3 pcs.), 3 (3 pcs.), 6 (3 pcs.), 7 (3 pcs.), 8 (3 pcs.), 1 (4 pcs.), ∑24.


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