Sudoku Classic

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About the Game Sudoku Classic

Released in 2026-09-22 • Categories:puzzlestrategycasual

Unicorn GamesUnicorn Games✓
4.9/ 5.0

680 verified ratings

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Modern Sudoku — Classic Number Logic Puzzle

Sharpen your mind and train your logical reasoning with Sudoku Classic on Unicorn Games. Whether you are a casual player looking to unwind during a quick break or a veteran puzzle solver tackling complex master grids, our modern Sudoku engine delivers an elegant, ad-free, responsive experience across desktop and mobile devices.

🧩 Features & Ergonomics

  • Multiple Difficulty Levels: Progress from Easy warm-ups through Medium, Hard, Expert, and Master challenges.
  • Daily Challenge Mode: Solve a unique global daily puzzle every day to build and maintain your daily streak.
  • Pencil Marks / Notes: Track candidate digits in empty cells with automatic conflict updates.
  • Intelligent Logical Hints: Stuck on a tough cell? Our bitmask solver explains the exact deduction technique without spoiling the board.
  • UnicornSDK Cloud Sync: Automatically save your campaign progress, completed levels, and best times across devices.
    • #sudoku#puzzle#logic#numbers#brain#daily-challenge#math

    Controls

    Place Number in Selected Cell1 - 9 / Numpad
    Navigate Grid CellsArrow Keys / Tap
    Erase Cell ContentBackspace / Delete
    Toggle Pencil Marks / Notes ModeP / Notes
    Reveal Smart Logical HintH / Hint
    Undo Last MoveU / Ctrl+Z
    Deselect Cell / Close DialogEsc
    Fill each 9x9 grid so every row, column, and 3x3 block contains the digits 1 through 9 with no repeated numbers.
    Supports Keyboard, Mouse & Touch

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