Sudoku Online
How to Play Sudoku
The goal of a Sudoku puzzle game is to fill a 9x9 grid with numbers so that each row,
column and 3x3 section contain all digits between 1 and 9.
Learn how to solve Sudoku puzzles online with our free Sudoku tutorials,
It doesn't matter if you're an absolute beginner or a Sudoku master!
Printable Sudoku Puzzles
In a time dominated by screens, our free printable sudoku pages provide a refreshing break and offer a hands-on experience that engages both young and old minds alike.
Latest Games
| Play | Level | Player | Time | ||
|---|---|---|---|---|---|
| Hard | 1034570 | Sanjith Naik | 20:24 | 2026-05-03 11:08:48 | |
| Medium | 831564 | Lantera | 03:44 | 2026-05-03 11:08:33 | |
| Hard | 1318821 | Warren | 11:37 | 2026-05-03 11:08:01 | |
| Hard | 1009448 | HeikeS. | 13:24 | 2026-05-03 11:08:01 | |
| Evil | 1866533 | Rudibelgium | 12:34 | 2026-05-03 11:07:48 | |
| Medium | 813514 | אברהם שיף | 22:33 | 2026-05-03 11:06:28 | |
| Evil | 1836090 | efo | 10:46 | 2026-05-03 11:05:46 | |
| Medium | 658298 | Patje | 14:55 | 2026-05-03 11:04:52 | |
| Easy | 476672 | Ks12 | 04:26 | 2026-05-03 11:04:50 | |
| Medium | 832039 | Lantera | 04:00 | 2026-05-03 11:04:20 |
Sudoku Game
Play sudoku puzzles online across four difficulty levels - easy, medium, hard, and evil - each with a unique solution. Use smart hints that explain the next logical step, pencil marks to track candidates, and the check button to verify your progress.
Challenge yourself with the timer, undo mistakes instantly, and highlight digits across the grid to spot patterns faster.
About Live Sudoku
Live Sudoku was created by Hagai Izenberg in 2006 and has grown into a home for over 100,000 sudoku players worldwide.
Play sudoku online, save your scores, track your statistics, and compete against players from around the world in real-time multiplayer matches.
Whether you're a beginner learning the basics or an expert solving evil puzzles, Live Sudoku offers the most dedicated sudoku experience online.
Free Sudoku Every Day
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Sudoku Strategies
Sudoku Tips for Beginners
New to Sudoku? Start with these two fundamental strategies that will help you solve easy and medium puzzles right away.
Scan for Last Digits - Look at any row, column, or 3x3 box that is almost complete. If eight of the nine numbers are already filled in, the missing digit is your answer. This is one of the simplest beginner Sudoku strategies and a great place to start every puzzle.
Find Hidden Singles - When a number can go in only one cell within a row, column, or 3x3 box, that is called a hidden single. Scan each group and ask: "Where can this number go?" If there is only one possible cell, fill it in.
These two techniques can help you solve most easy Sudoku puzzles and many medium ones. As you improve, move on to pencil marks and more advanced strategies.
Advanced Sudoku Techniques
Once you're comfortable with the basics, these strategies will help you tackle hard and evil puzzles:
Pencil Marks - Write small candidate numbers in empty cells to track which values are still possible. This is essential for every advanced technique and the key to solving harder puzzles systematically.
X-Wing - When a number can only appear in the same two columns across two different rows, you can eliminate that number from those columns in all other rows. Look for matching pairs that form a rectangle on the grid.
Swordfish - An extension of X-Wing across three rows and columns. Harder to spot, but powerful for eliminating candidates in difficult puzzles.
Master these techniques in our tutorials, or jump straight into hard Sudoku and evil Sudoku to put them into practice.