Sudoku
Classic number puzzle
Fill the grid so that every row, column and 3×3 box holds the numbers 1 to 9 exactly once. Every puzzle is made fresh and has one solution.
Choose easy, medium or hard. Use pencil notes to track candidates, undo a move, or spend one of three hints when you are stuck. Three mistakes end the game, and your best time for each level is saved.
Good to know
- Free, no download, no sign-up.
- Works on phone and computer. On a computer, use the number keys, arrow keys, N for notes and Ctrl+Z to undo.
- A new puzzle every game, with a single solution each time.
- Your game is saved if you leave, so you can continue later.
- Plays in English and Turkish.
How to play
- Choose easy, medium or hard.
- Select a cell, then a number. Each row, column and 3×3 box must hold 1 to 9 exactly once.
- Turn on notes to pencil in candidates for a cell.
- Use undo or one of your three hints when you are stuck. Three mistakes end the game.
Tips
- Start with the rows, columns and boxes that already hold the most numbers.
- Use notes for cells that have only two or three possible numbers.
- If you are not sure, write a note instead of guessing; a wrong number counts as a mistake.