The Largest Sudoku
Puzzle Vault
Books packed with 200 puzzles each. A free app for your phone. Printable grids you can solve right now. Four difficulty levels. No ads. No fluff. Just Sudoku.
Play Today's Sudoku Free
Solve in your browser. No download. No account. Resets every day at midnight.
What Is Sudoku?
Sudoku is a number placement puzzle played on a 9x9 grid. The grid is split into nine 3x3 boxes. Some cells already have numbers in them. Your job is to fill in the rest so that every row, every column, and every 3x3 box contains the digits 1 through 9 exactly once. No repeats in any row, column, or box.
You do not need to be good at math. Sudoku is pure logic. You look at what numbers are missing, figure out where they can go, and place them one at a time. Beginners start with easy puzzles that have many given numbers. Experts tackle grids with very few givens and need advanced techniques like naked pairs, X-wing, and swordfish to crack them.
The puzzle first appeared in a U.S. magazine in 1979 under the name “Number Place.” A Japanese publisher picked it up in 1984 and gave it the name Sudoku, which means “single number.” By 2005, Sudoku had spread to newspapers around the world. Today, millions of people solve Sudoku puzzles every day on paper, in books, and on their phones.
Why SudokuVault?
We built the collection we always wanted. Massive. Well-organized. No filler puzzles.
6 Books, 1,200 Puzzles
Six volumes covering easy to expert. 200 puzzles in each book. Large, clean grids with plenty of workspace.
Free App
Play on iPhone or Android. Four difficulty levels, pencil marks, hints, and daily challenges. Works offline.
Free Printable Puzzles
Download and print Sudoku grids at home. New puzzles every week. Easy, medium, hard, and expert.
Strategy Guides
Learn every technique from basic scanning to X-wing and swordfish. Written in plain language anyone can follow.
A Vault, Not Just a Book
Most Sudoku books give you one stack of puzzles at one difficulty. You finish it and buy another. SudokuVault is different. We built a growing vault of puzzles that spans every skill level and every format.
The vault has six printed volumes. Volume 1 is 200 easy puzzles perfect for beginners. Volume 2 is 200 medium puzzles. Volume 3 has 200 hard grids. Volume 4 holds 200 expert-level puzzles that will test even seasoned solvers. Volume 5 is a large-print edition made for seniors and anyone who wants bigger grids. Volume 6 is for kids, with 4x4 and 6x6 starter puzzles that teach the rules step by step.
Beyond the books, the vault includes a free mobile app with thousands of digital puzzles, a printable puzzle library that gets new grids every week, and a blog full of strategy guides and tips. Every puzzle in the vault is hand-tested for a single valid solution. No duplicates. No broken grids.
Whether you solve one puzzle a day or burn through a book a week, SudokuVault has enough to keep you busy for years. That is the idea. One brand. One place. Every puzzle you will ever need.
Daily Puzzle Challenge
A fresh puzzle every day in the app. Track your streak, beat your best time, and compete with friends.
Timed Solve
Race the clock on every daily grid
Streak Tracker
Build a daily solving streak
Leaderboards
See how you rank against other solvers
Four Difficulty Levels
Easy
36-45 givens
Great for beginners. Lots of starting numbers. You can solve these with basic scanning alone.
Medium
27-35 givens
A step up. You will need some pencil marks and basic elimination. Good daily practice.
Hard
22-26 givens
Requires techniques like naked pairs and hidden singles. Expect to think a few moves ahead.
Expert
17-21 givens
Minimal givens. You will need X-wing, swordfish, and sometimes chains. Not for the faint of heart.
Why People Solve Sudoku
Research shows that puzzle-solving keeps your brain active. Sudoku works the parts of your mind that handle logic, pattern recognition, and short-term memory. A 2019 study from the University of Exeter found that adults who regularly solve word and number puzzles have sharper cognitive function than those who do not. Sudoku does not prevent memory loss, but it does give your brain a daily workout.
Beyond brain health, Sudoku is a stress reducer. Solving a grid forces you to focus on one task. Your phone notifications, your to-do list, and your worries all fade into the background while you work through the logic. Many solvers describe it as a form of meditation. You sit down, pick up a pencil, and the world gets quiet for a few minutes.
Sudoku is also a great screen-free hobby. Our printed books and printable puzzles let you unplug and solve with nothing but paper and pencil. No battery, no Wi-Fi, no distractions. Just you and the grid.
Who Is SudokuVault For?
Beginners who have never solved a Sudoku puzzle. Our easy books and rules page walk you through every step. Start with 4x4 grids if standard 9x9 feels overwhelming.
Daily solvers who want a reliable source of quality puzzles. The app gives you a new puzzle every day. The books give you hundreds more for offline solving.
Seniors looking for large-print puzzles that are easy on the eyes. Volume 5 uses bigger fonts, thicker grid lines, and generous spacing so you can solve without squinting.
Kids ages 6 and up. Volume 6 starts with 4x4 grids, moves to 6x6, and builds confidence before stepping up to standard 9x9. Every puzzle comes with an answer key.
Speed solvers and experts who want grids with 17 to 21 givens and no shortcuts. Volume 4 will push you to your limit.