Extreme Sudoku #464868 | Peak Sudoku

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This puzzle

#464868

Extreme(85/100)
SE: 5.4
Clues: 28
Symmetry: Anti-diagonal

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle7

Hidden Single Naked Single Pointing Pair Naked Triple Skyscraper XY-Wing BUG+1

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Extreme Sudoku #464868 | Peak Sudoku