Sudoku
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1 | 2 | 3 | 4 |
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| 5 | 6 | 7 | 8 | 9 |
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1 | 2 | 3 | 4 |
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| 5 | 6 | 7 | 8 | 9 |
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generating a new grid…
Main symbols
More help is available here.
Additional tools:
(Not available for custom sudokus.)