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Sudoku Online: Play Unlimited Games for Free

Sudoku is a logic puzzle that is easy to learn but hard to master. It is possible to solve it without guessing, using deduction to figure out the next missing number.

How to Play:

You are initially given a 9x9 grid with pre-filled numbers. Your goal is to fill in the missing squares such that each row, each column, and each block contains the numbers 1 to 9.

Image explaining row, column, and block in Sudoku


  • Simple design and user interface. Easy to use for the casual player.
  • Choose between three difficulty levels, whether you're feeling like challenging yourself or just having a good time.
  • Timer. Beat your personal record, or compete with friends.
  • Enter numbers using onscreen buttons or keyboard.
  • Assign notes to any cell, so you can apply logical deduction to your next move.
  • Check your answers at any time, and receive instant feedback.
  • Unlimited replays, not just one game a day.