0:00Time
—Best
How to play
Tap a cell, then tap a number (or use your keyboard's 1–9). Each of the nine rows, nine columns, and nine 3×3 boxes must contain the digits 1 to 9 with no repeats. Duplicates are flagged in red, and every cell sharing the selected number is highlighted to help you scan.
Turn on Notes to pencil in candidate digits for a cell; placing a real number automatically clears that candidate from the rest of its row, column, and box. Arrow keys move the selection, Backspace erases, and N toggles Notes.
Runs entirely in your browser. Your puzzle, progress, and best times are saved only on this device.