How do you play Sudoku?
Fill a 9×9 grid so every row, column, and 3×3 box contains each digit from 1 to 9 exactly once.
Sudoku Online
Sudoku Hot is a free sudoku puzzle game and a focused place to play Sudoku puzzles in your browser—classic 9×9 grids, a calm UI, and quick access to daily Sudoku, hard Sudoku, expert Sudoku.
Play Sudoku
Start a new classic Sudoku puzzle instantly—no sign-up.
Daily Sudoku
One featured puzzle per day, with a gentle streak calendar.
How to Play Sudoku
Learn the classic row, column, and 3×3 box rules before you solve.
Hard Sudoku
Fewer givens, sharper deduction—practice advanced logic.
Expert Sudoku
High difficulty puzzles designed for experienced solvers.
Printable Sudoku
Prefer paper? Generate printable Sudoku sheets with custom difficulty and layout.
Create printable puzzlesKiller Sudoku
Killer Sudoku combines classic Sudoku rules with cage sums. If you’re curious, our guide explains the rules and shows examples.
Learn Killer Sudoku rulesSudoku FAQ
What is the difference between easy and hard Sudoku?
Easy Sudoku puzzles start with more given digits and leave fewer cells to solve. Hard puzzles have fewer clues and usually require more advanced deduction.