Extreme Sudoku #448722 | Peak Sudoku

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81 leftNo cell selected

Puzzle: #448722
Difficulty: Extreme(88/100)SE 5.6
Clues: 28
Symmetry: 180° rotational

1–9 writes into the selected cells.

Techniques in this puzzle9

Naked Single×13 Hidden Single×3 Pointing Pair×3 Claiming×1 Naked Pair×1 2-String Kite×1 XY-Wing×2 W-Wing×1 ALS Chain×3

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Extreme Sudoku #448722 | Peak Sudoku