42% complete
34/81 correct ยท 34 filled
Medium Board
Fast controls, saved progress, and premium-feel feedback.
Instant validation
Mark wrong placements as you enter them.
Reveal mistakes
Toggle visible mistake highlights when you want a cleanup pass.
Hints
0
Win rate
0%
Streak
0
Pick a cell to start.
Play Sudoku online with clean speed and zero friction
Start a puzzle immediately, switch difficulties, save your place locally, and keep your sessions focused with subtle, fast controls.
Complete 30 Sudokus in March 2026
Completed
0
Goal
30
Streak
0
Every finished board counts. Daily runs, random boards, and difficulty switches all move the counter forward.
Month challenge: finish 30 Sudokus before the month ends
This challenge is stored locally on your device, so you can keep the arcade-style rhythm without creating an account. Finish any mix of easy, medium, hard, expert, or daily boards to clear the month.
Every completed board counts toward the monthly total, including replayed difficulties and daily puzzles.
Use the Hall of Fame after each finish to save a retro alias and build a local cabinet of great runs.
How to use the board efficiently from the first move
This route is built for instant play, but it should also teach a clean solving rhythm. Use this quick tutorial to turn the game controls into a better process.
Step 1
Pick one zone and commit to it
Instead of scanning the whole grid at once, choose a single row, column, or box. Focused scanning reduces noise and helps strong candidates stand out.
Step 2
Use the board highlights to keep context
When you select a cell, Today's SUDOKU highlights related units and matching values. Use those cues to see the puzzle structure faster and avoid accidental duplicate placements.
Step 3
Switch between final answers and notes deliberately
Treat notes mode like a different solving layer. Final answers belong to cells you trust; notes belong to cells you are still narrowing down.
Step 4
Check progress when you want a cleanup pass
Reveal mistakes and Check both help you stabilize the board. They are especially useful after a long sequence of note-heavy solving.
Learn the logic behind the game
The best Sudoku site should not stop at the board. These pages explain the rules, strategy habits, and note-taking concepts that help players improve steadily.
How to play Sudoku
Start with the fundamentals of the grid, the core rule set, and a beginner-friendly solving rhythm.
Sudoku rules
Learn the formal rules clearly so you can separate valid logic from accidental mistakes.
Sudoku strategies
Build stronger habits for scanning, eliminating, and progressing through tougher boards.
Sudoku tips for beginners
Use a cleaner process to improve faster and avoid the most common early habits that slow players down.
How to solve hard Sudoku
Focus on note discipline, pressure points, and patient rescanning when easy logic runs out.
What pencil marking means
Understand notes mode, why it matters, and how to keep pencil marks useful instead of cluttered.
Sudoku history
See where Sudoku came from, how it evolved from older number puzzles, and why the modern version became a global habit.