How do you play Sudoku?

Fill the 9x9 grid so each row, column, and 3x3 box includes numbers 1 through 9 exactly once.

Is Sudoku One9x free to play?

Core gameplay is free on web and Android. Optional paid items may be added for extra content.

Where can I play Sudoku One9x?

You can play in your browser at /game or download the Android app from Google Play.

Does Sudoku One9x support offline play?

Yes. Core gameplay works offline because puzzles are generated on the device. Some features, such as online puzzle content, may require internet.

The Sudoku Experience

🧠 Engaging Puzzles

Immerse yourself in a world of thought-provoking puzzles that cater to all skill levels. From beginner-friendly grids to mind-bending challenges, we’ve curated a diverse collection to keep you entertained.

🌐 Web + Android + Offline

Play on the web or Android and continue solving even when you are offline. Core gameplay is available without internet, while some online features and puzzle content may require a connection.

🚀 Constant Innovation

We believe in the continuous improvement of your Sudoku experience. Our team is dedicated to introducing innovative features, updates, and improvements regularly, so you can always look forward to fresh challenges and exciting enhancements.

How to Play Sudoku

The goal of Sudoku is to fill a 9×9 grid with digits so each column, row, and 3×3 section has numbers 1-9. Initially, some squares are filled.
Use logic to complete the grid, avoiding:

Duplicate numbers in any row
Duplicate numbers in any column
Duplicate numbers in any 3×3 grid

Sudoku Tips

Mastering this puzzle can seem daunting for beginners, but fear not—we've got tips to boost your skills.

Tip 1: Identify rows, columns, or 3×3 sections with 5 or more numbers. Fill empty cells by trying unused numbers, often revealing the only possible position.
Tip 2: Visually divide the grid into 3 columns and 3 rows. Spot columns or grids with 2 of the same number; logically, the 3rd copy must be in the remaining 9-cell section. Explore each position to locate the missing number. Happy Sudoku solving!

Now that you know a little more about Sudoku, jump in and enjoy the core gameplay for free.

About This Game

Master the art of logic with Sudoku, designed for both casual players and competitive solvers. Relax with classic puzzles or race against the clock with focused challenge modes. The core experience is ad-free and offline-ready.

Key Features

Multiple Game Modes: Classic (Easy, Medium, Hard, Expert), Rush Hour, Timed Mode, and Daily Challenges with archive access.
Track Your Progress: Follow streaks, win rates, best times, and average times across modes.
Create & Import: Build your own puzzles with Puzzle Creator or import puzzles from external sources.
Premium Experience: 100% ad-free interface, offline-ready core play, customizable UI, and auto-save progress.

Sharpen your mind and build a daily Sudoku habit with consistent, logic-first gameplay.

Your Ultimate Destination for