Sudoku
puzzleSudoku is a free online number puzzle with fresh, uniquely solvable boards across Easy, Medium, Hard, and Expert difficulties. Use notes, hints, undo and redo, mistake highlighting, and a pauseable timer while you chase a new best time.
How to play
Choose a difficulty and start a new game, then select any empty cell and enter a digit from 1 to 9 using the number pad or keyboard. Complete the grid so every row, column, and 3×3 box contains each digit exactly once. Turn on Notes to pencil in candidates, use Undo or Erase to revise moves, and spend one of three hints when you need help. Pause the timer at any point; the current puzzle automatically saves in this browser.
Tips
- Start with rows, columns, or 3×3 boxes that already contain the most given digits — they usually have the fewest possibilities.
- Use Notes mode to record candidates, then eliminate them as matching digits are placed in the same row, column, or box.
- Selecting a cell highlights its row, column, box, and matching digits so patterns are easier to spot.
- Each puzzle has one solution; choose Easy, Medium, Hard, or Expert based on how many starting clues you want.
- Your in-progress puzzle, preferences, and best time for each difficulty save in this browser.
FAQ
- How do I play Sudoku?
- Choose a difficulty and start a new game, then select any empty cell and enter a digit from 1 to 9 using the number pad or keyboard. Complete the grid so every row, column, and 3×3 box contains each digit exactly once. Turn on Notes to pencil in candidates, use Undo or Erase to revise moves, and spend one of three hints when you need help. Pause the timer at any point; the current puzzle automatically saves in this browser.
- Is Sudoku free to play?
- Yes. Sudoku runs free in your browser on minigames4u — no download or account required.
- Any tips for Sudoku?
- Start with rows, columns, or 3×3 boxes that already contain the most given digits — they usually have the fewest possibilities. Use Notes mode to record candidates, then eliminate them as matching digits are placed in the same row, column, or box. Selecting a cell highlights its row, column, box, and matching digits so patterns are easier to spot. Each puzzle has one solution; choose Easy, Medium, Hard, or Expert based on how many starting clues you want. Your in-progress puzzle, preferences, and best time for each difficulty save in this browser.
