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A classic Sudoku. Select a cell, then choose a number.
Difficulty
Easy · 40 clues
Medium · 32 clues
Hard · 26 clues
New puzzle
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Clear
How it works
Fill every empty cell with a number from 1 to 9.
Each number must appear once in every row, column, and 3×3 box.
Filled cells are checked immediately. A conflicting cell is highlighted.
Complete the puzzle using the unique solution.
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