Tricky Sudoku #12220 | Peak Sudoku

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This puzzle

#12220

Tricky(48/100)
SE: 3
Clues: 24
Symmetry: Anti-diagonal

81 leftNo cell selected

1–9 writes into the selected cells.

Techniques in this puzzle3

Naked Single Hidden Single Naked Pair

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Tricky Sudoku #12220 | Peak Sudoku