Daily sudoku

How to play

Fill the grid so every row, every column and every 3 by 3 box holds the digits 1 to 9 exactly once. The numbers already on the board are clues and cannot be changed.

Tap a square, then tap a number on the pad under the grid. On a computer you can also type 1 to 9, use the arrow keys to move, and press Backspace to erase. Tap Notes (or press N) to jot small pencil marks for the digits a square could be.

A number that clashes with another one in its row, column or box turns red. The timer starts with your first move and stops when the grid is complete. Your moves are saved in this browser, so you can close the page and come back.

About these puzzles

The daily puzzle is a medium sudoku that is the same for everyone. The page address never changes. The grid is chosen from today's date in UTC, so a new puzzle arrives at midnight UTC and the old one is gone from this page, though your finished time stays in your own browser.

Every puzzle is built by code, not by a person or a model. The page address holds a level and a seed number, so the same address always gives the same puzzle. Before a puzzle is shown, a solver checks that it has exactly one solution, so you never need to guess.

Tips

• Start with the digit that appears most often on the board and look for the one square in each box where it can still go.
• When a square has only one digit left that fits, write it in. When a digit fits only one square in a row, column or box, write that in too.
• On the harder levels, use Notes. Pencil in the candidates for a few squares, and look for two squares in a unit that share the same two candidates.

More puzzles

Pick a level: Easy, Medium, Hard, Expert, or play the daily sudoku. Looking for something different? Try a word search.