Tough Sudoku #372686 | Peak Sudoku

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This puzzle

#372686

Tough(63/100)
SE: 3.8
Clues: 32
Symmetry: 180° rotational

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle7

Naked Single Hidden Single Pointing Pair Naked Pair Naked Triple Skyscraper Swordfish

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Tough Sudoku #372686 | Peak Sudoku