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Game over

You made 3 errors and lost this game

You lost!
You won!
Errors: 0/3
00 : 00
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9

Hotkeys:

  • Q - Notes mode
  • W - Hint
  • E - Pause/Resume
  • Enter - New game
  • ←↑→↓ - Move between cells
  • 1-9 - Enter numbers

Sudoku online — Solve puzzles for free

Sudoku represents a fascinating numerical puzzle that has gained great popularity worldwide. The essence of the game consists of filling a 9x9 grid with digits from 1 to 9 so that each digit appears only once in each row, column and 3x3 square. The difficulty lies in the fact that not all cells already contain numbers, and the player must logically calculate the remaining values. On our portal you can play Sudoku completely free without registration.

Platform capabilities

Our site provides all the necessary tools to solve Sudoku comfortably:

  • Multiple difficulty levels: from simple for beginners to extreme for professionals (easy, medium, hard, expert, master, epic).
  • Hint system and error control: 3 hints per game and the ability to make up to 3 errors, after which the game ends.
  • Notes function: ability to make notes in cells to track possible options.
  • Timer and pause control: tracking solving time and ability to pause the game at any time.
  • Hotkey system:
    • Q: activate/deactivate notes mode.
    • W: get hint.
    • E: pause/resume game.
    • Enter: start new game.
    • ←↑→↓: cell navigation.
    • 1–9: enter numeric values.
  • Adaptive design: convenient interface for smartphones and tablets.
  • Print function: ability to download and print Sudoku to solve on paper.
  • Google integration: save progress and compete with friends.
  • Regular updates: constant improvement of functionality and addition of new capabilities.

Solving methodologies

  1. Exclusion principle: analyze rows, columns and 3×3 blocks to exclude impossible digits for each cell.
  2. Search for unique option: if only one digit is possible in a cell, insert it immediately.
  3. Application of notes: record potential digits in notes mode to reduce options.
  4. Pair exclusion technique: if in a row, column or block two cells can contain only two identical digits, exclude them from other cells.
  5. Advanced strategies: use methods like "hidden pairs" or "X-Wing" for expert levels.
  6. Systematic practice: regular training at various difficulty levels will significantly improve your skills.

Sudoku online without restrictions

Playing Sudoku online for free on our resource is the optimal way to spend time beneficially for the mind. The easy level is suitable only for beginners, while the hard level represents a true challenge for experienced players. Sudoku with hints will help in difficult situations, and the timer will add an element of competition. The mobile version of Sudoku allows you to play anywhere, and the print function gives the possibility to solve puzzles traditionally. Join millions of fans of classic 9x9 Sudoku, start playing without registration directly now.

Basic rules

The goal of Sudoku is to fill a 9×9 grid with digits from 1 to 9 so that:

  • Each row contains all digits from 1 to 9 without repetitions.
  • Each column contains all digits from 1 to 9 without repetitions.
  • Each small 3×3 square contains all digits from 1 to 9 without repetitions.

The game starts with a partially filled grid, and your task is to logically calculate the missing digits.

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