Tough Sudoku #212474 | Peak Sudoku

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This puzzle

#212474

Tough(65/100)
SE: 4
Clues: 26
Symmetry: Vertical mirror

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle3

Naked Single Hidden Single Skyscraper

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Tough Sudoku #212474 | Peak Sudoku