Extreme Sudoku #10498 | Peak Sudoku

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This puzzle

#10498

Extreme(87/100)
SE: 5.6
Clues: 27
Symmetry: Anti-diagonal

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle11

Hidden Single Naked Single Pointing Pair Claiming 2-String Kite XY-Chain Unique Rectangle Naked Quad Naked Pair Naked Triple BUG+1

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Extreme Sudoku #10498 | Peak Sudoku