Tough Sudoku #286534 | Peak Sudoku

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This puzzle

#286534

Tough(70/100)
SE: 4.1
Clues: 28
Symmetry: 180° rotational

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle5

Hidden Single Naked Single Pointing Triple 2-String Kite Pointing Pair

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Tough Sudoku #286534 | Peak Sudoku