Tough Sudoku #311675 | Peak Sudoku

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81 leftNo cell selected

Puzzle: #311675
Difficulty: Tough(68/100)SE 4
Clues: 25
Symmetry: 180° rotational

1–9 writes into the selected cells.

Techniques in this puzzle5

Naked Single×11 Hidden Single×3 Pointing Pair×1 Naked Pair×1 Skyscraper×1

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Tough Sudoku #311675 | Peak Sudoku