Extreme Sudoku #464872 | Peak Sudoku

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This puzzle

#464872

Extreme(86/100)
SE: 5.6
Clues: 26
Symmetry: Diagonal

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle9

Naked Single Hidden Single Claiming Skyscraper XY-Wing Naked Pair XYZ-Wing Naked Quad BUG+1

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Extreme Sudoku #464872 | Peak Sudoku