🔢Sudoku
Classic Sudoku with unique-solution puzzles, notes and smart hints
Time
00:00
Mistakes
0
Fastest
–
Fill every row, column and box with 1-9, no repeats! · Select a cell then press 1–9 (or tap the number pad). N toggles pencil notes; matching digits highlight automatically.
How to Use
Fill the 9×9 grid so every row, column and 3×3 box contains 1–9 exactly once. Every puzzle is generated to have a single unique solution, with conflict highlighting and hints.
FAQ
Are puzzles uniquely solvable?
Yes — the digger verifies uniqueness at every removal.
What if I enter a wrong digit?
Digits conflicting with the solution turn red and count as mistakes, but nothing is blocked.