Extreme Sudoku #19672 | Peak Sudoku

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#19672

Extreme(84/100)
SE: 5.5
Clues: 25
Symmetry: 180° rotational

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle5

Naked Single Hidden Single Pointing Pair Naked Triple XY-Chain

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Extreme Sudoku #19672 | Peak Sudoku