Tough Sudoku #10633 | Peak Sudoku

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This puzzle

#10633

Tough(70/100)
SE: 4
Clues: 25
Symmetry: Asymmetric

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle7

Hidden Single Naked Single Pointing Pair Naked Pair Skyscraper Naked Triple Claiming

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Tough Sudoku #10633 | Peak Sudoku