Diabolical Sudoku #20520 | Peak Sudoku

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81 leftNo cell selected

Puzzle: #20520
Difficulty: Diabolical(92/100)SE 7.1
Clues: 23
Symmetry: 180° rotational

1–9 writes into the selected cells.

Techniques in this puzzle6

Naked Single×13 Hidden Single×4 Pointing Pair×1 Claiming×1 Naked Pair×1 W-Wing×1

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Diabolical Sudoku #20520 | Peak Sudoku