Tough Sudoku #184913 | Peak Sudoku

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81 leftNo cell selected

Puzzle: #184913
Difficulty: Tough(70/100)SE 4.1
Clues: 25
Symmetry: 180° rotational

1–9 writes into the selected cells.

Techniques in this puzzle6

Naked Single×13 Hidden Single×5 Pointing Triple×1 Claiming×1 Naked Pair×2 XY-Wing×1

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Tough Sudoku #184913 | Peak Sudoku