Tough Sudoku #279913 | Peak Sudoku

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81 leftNo cell selected

Puzzle: #279913
Difficulty: Tough(68/100)SE 4
Clues: 26
Symmetry: Vertical mirror

1–9 writes into the selected cells.

Techniques in this puzzle5

Naked Single×10 Hidden Single×4 Pointing Triple×1 Claiming×1 Skyscraper×1

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Tough Sudoku #279913 | Peak Sudoku