Sudoku #h283

Sudoku game, level: Hard #283. This Sudoku have 23 given numbers (clues)..
Structure: 3 (1 pcs.), 8 (2 pcs.), 9 (2 pcs.), 7 (2 pcs.), 5 (2 pcs.), 6 (3 pcs.), 2 (3 pcs.), 1 (4 pcs.), 4 (4 pcs.), ∑23.


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