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Sudoku
Fill the grid so every row, column and box has 1–9.
Strict mode — 3 mistakes and it's over
One phone, one brain, no repeats.
- Tap a cell, then tap a number to place it. Tap the same number again to clear.
- Every row, every column, and every 3×3 box must contain 1 through 9 exactly once.
- Duplicates flash red. The bold given numbers are locked — you can't change those.
- Hit ✏️ Notes to jot tiny pencil marks in a cell's corners while you think.
Beat your best time on each difficulty. 🏆