Sudoku #h600

Sudoku game, level: Hard #600. This Sudoku have 25 given numbers (clues)..
Structure: 8 (2 pcs.), 6 (2 pcs.), 5 (2 pcs.), 2 (2 pcs.), 9 (3 pcs.), 3 (3 pcs.), 1 (3 pcs.), 4 (4 pcs.), 7 (4 pcs.), ∑25.


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7
3
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9
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