About Daily Sudoku
Daily Sudoku is the classic 9×9 number placement puzzle. Fill the empty squares so that every row, every column and every 3×3 box contains each digit from 1 to 9 exactly once. Every puzzle has exactly one solution, and the difficulty is shown on the page.
How to play Daily Sudoku
- Fill every empty square with a digit from 1 to 9.
- Each row, each column and each 3×3 box must contain every digit exactly once.
- Select a square, then type a digit or tap the number pad. Use arrow keys to move.
- Pencil mode adds small notes instead of answers. Clashing digits are flagged so you can fix them.
Tips & strategy
- Start with the digit that appears most often and find where it must go in each remaining box.
- Look for a square that can only take one digit because its row, column and box already hold the other eight.
- Use pencil mode to note the possible digits in busy boxes, then clear notes as you place digits.
- When two squares in a row, column or box can only hold the same two digits, those digits can go nowhere else in it.
Daily Sudoku: questions and answers
Does every Daily Sudoku have one solution?
Yes. Every puzzle is checked to have exactly one solution before it is published.
What are pencil marks?
Small notes you add to a square to keep track of the digits it could still hold. Switch on pencil mode to add them.
How is Daily Sudoku ranked?
By time. The fastest correct solve on the day tops the leaderboard.
Which difficulty is today’s puzzle?
The difficulty is shown next to the puzzle number. Harder days give you fewer starting digits and need more advanced steps.
What should I do when I am stuck?
Pick a digit and check every box for the one square it can go in, then look for squares with only one possible digit. When that stops working, note the candidates in the squares with two or three options and look for pairs.