Sudoku
Fill the 9x9 grid with digits 1 through 9 so every row, column, and 3x3 box contains each digit exactly once. Every puzzle is generated with a guaranteed unique solution.
Time
00:00
Mistakes
0
Best
—
How to play
- Click an empty cell, then type a digit on your keyboard or tap the number pad below the board.
- Every row, column, and 3x3 box must contain digits 1 through 9 with no repeats.
- Cells with a conflict (a repeat) are highlighted red — fix them to continue.
- The game ends when the whole grid is filled correctly.
Frequently asked questions
Does every puzzle have a solution?
Yes, every generated puzzle is checked by a dedicated algorithm to confirm it has exactly one solution — no puzzles with multiple answers or no answer at all.
What does the "Mistakes" counter mean?
Every digit that doesn't match the correct solution adds one mistake — tracked separately from the visual conflict highlighting.
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