Fill the grid.
Clear your mind.
Take a break, challenge yourself, and enjoy the satisfaction of every solved puzzle.
Six ways to play
Pick your board
Today's puzzle is live
One fresh puzzle a day, the same for everyone. Solve it, keep your streak, climb the leaderboard.
Play Today's Puzzle →Race friends in real time
Same board, same clock. Bank fast placements, chase the box-completion bonus, and beat them to the finish.
How it works
Sudoku is easy to learn but hard to master. Here is everything you need to know to get started.
Choose your challenge
Select a difficulty level from Easy to Evil, or explore Mini, Killer, Time Rush, and real-time multiplayer duels. Whether you want to relax or compete, there is a mode for you.
Fill the grid
Your goal is to fill the 9x9 grid with digits so that every column, every row, and every 3x3 subgrid contains all of the digits from 1 to 9. Simple rules, endless possibilities.
Use pure logic
No math is required! Use the process of elimination and logical deduction to find the right spot for every number. Stay focused and keep your mind sharp.
Sharpen your game
Learn & Improve
Guides, techniques, and tools to sharpen every solve.
Techniques
Every solving method, from naked singles to forcing chains.
Solver
Stuck? See the logical next step on any grid.
Open the solver →The rules and your first moves, explained simply.
Learn the basics →The complete guide to thinking like an expert solver.
Read the guide →Fresh from the blog
Strategy, tips & deep-dives
New guides and solving insights, straight from the puzzle desk.
Why Playing Daily Sudoku Actually Makes You Better
What actually improves when you play sudoku daily, when the skill curve clicks, and how to build a puzzle habit that sticks.
Read the post →How to Solve Hard Sudoku Puzzles Without Guessing
Stuck on hard sudoku? The mental shift, the pencil-mark system, and six techniques that crack difficult puzzles — no guessing required.
Read the post →Is Sudoku Good for Your Brain? What the Research Shows
An honest look at whether sudoku is good for your brain: the 19,000-person study, what's proven, what's overstated, and how to benefit most.
Read the post →