Daily Sudoku Puzzles for 2026

Today's Sudoku Challenge — April 23, 2026

Start your day with a fresh Sudoku puzzle. Choose your difficulty level and play instantly in your browser.

Why Choose Sudoku365?

What is Sudoku?

Sudoku is a logic-based number puzzle. The goal is to fill a 9×9 grid with digits from 1 to 9, following three simple rules:

1. Each row must contain every digit from 1 to 9 without repetition.
2. Each column must contain every digit from 1 to 9 without repetition.
3. Each 3×3 box (there are nine of them) must contain every digit from 1 to 9 without repetition.

The puzzle starts with some numbers already filled in (called "givens" or "clues"). Your task is to use logic and deduction to fill in the remaining cells. A well-designed Sudoku has exactly one unique solution reachable without guessing.

Benefits of Playing Sudoku

• Improves concentration and focus: Sudoku rewards sustained attention to detail and pattern recognition.
• Enhances logical thinking: Regular practice strengthens deductive reasoning.
• Provides stress relief: The meditative quality of solving puzzles helps many players unwind.
• Boosts working memory: Tracking candidates and patterns gives your memory a workout.
• Accessible for all ages: The rules are language-independent and work at any difficulty.

How to Play Sudoku Online

Playing Sudoku on Sudoku365 is simple and intuitive:

1. Select a puzzle: Choose Easy, Medium, Hard, or Expert.
2. Click a cell: Click any empty cell to select it (given numbers cannot be changed).
3. Enter a number: Click a number button below the grid, or press 1–9 on your keyboard.
4. Navigate with arrows: Use arrow keys to move between cells quickly.
5. Use hints sparingly: The Hint button fills one cell for you, but it's more rewarding to work it out.
6. Check your work: The Check button highlights any mistakes you've made so far.
7. Complete the puzzle: Fill every cell correctly to finish. Your time is recorded locally.

Game Modes

• Paper Mode: No automatic error checking. Solve like you would on paper.
• Auto-Check Mode: Mistakes are highlighted immediately in red.

Explore Sudoku365

Recent Daily Sudoku Puzzles

Catch up on puzzles from the past few days. Each day features four difficulty levels to match your skill.

View Full 2026 Archive →

Frequently Asked Questions

Is Sudoku365 completely free?

Yes, every puzzle on Sudoku365 is free to play in your browser. The site is supported by display advertising.

Do I need to create an account?

No account is required. Visit any puzzle page and start playing immediately. Local progress is kept in your browser.

How many puzzles are available?

The site generates four puzzles per day across the 2026 calendar — one for each of Easy, Medium, Hard, and Expert.

Can I play Sudoku offline?

Once a puzzle page has loaded, the puzzle can often be solved without an active network connection, since it's a simple static page.

What makes a good Sudoku puzzle?

A quality Sudoku has exactly one unique solution and can be solved using logical deduction alone, without guessing. Puzzles here are generated with that property in mind.

What's the difference between difficulty levels?

• Easy: Around 38–40 clues, solvable with basic scanning.
• Medium: Around 33–35 clues, requires hidden singles and naked pairs.
• Hard: Around 29–31 clues, needs patterns like locked candidates.
• Expert: Around 25–27 clues, expects techniques like X-Wing and Swordfish.

How do I improve at Sudoku?

Start with easy puzzles to build confidence. Learn basic techniques in the strategy section. Practice daily to recognize patterns faster. Gradually increase difficulty as you improve.