Hard Sudoku #335700 | Peak Sudoku

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This puzzle

#335700

Hard(53/100)
SE: 3.4
Clues: 27
Symmetry: 180° rotational

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle4

Hidden Single Naked Single Pointing Pair Naked Quad

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Hard Sudoku #335700 | Peak Sudoku