What is Sudoku Time Attack?
Sudoku Time Attack is a browser-based number puzzle game that you can play instantly without installing anything. It includes multiple difficulty levels, note mode, a daily challenge calendar, and a global ranking feature. It is not just about speed — Sudoku is a logic puzzle that rewards concentration, pattern recognition, and careful deduction.
Beginners can start with easier puzzles and gradually move to harder boards as they improve. Since Sudoku does not require arithmetic, it is suitable for players of all ages who enjoy logical problem solving.
Basic Sudoku Rules
- Fill the 9×9 grid with numbers from 1 to 9.
- Each row can contain each number only once.
- Each column can contain each number only once.
- Each 3×3 box can contain each number only once.
Why Note Mode Matters
On harder puzzles, many cells cannot be solved immediately. Note mode helps you keep track of possible candidates, making it much easier to narrow down the correct answer through logic.
Daily Challenge and Ranking
This site includes a daily challenge feature so you can try a new puzzle for each date. Completion status is stored in your browser, and the global TOP10 ranking lets you compare your best times with other players.
Beginner Tips
- Start with rows and columns that already contain many numbers.
- Check each 3×3 box carefully.
- Use note mode to organize candidates.
- Rely on logic and elimination rather than guessing.
Sudoku Guides
Explore Other Puzzle Games
In addition to Sudoku, sotjun.com also features Gomoku, a strategy board game focused on pattern recognition and tactical play. If Sudoku is about logical deduction, Gomoku is about board control and move planning.
Frequently Asked Questions
Where is daily challenge progress stored?
It is currently stored in your browser’s localStorage. If you clear browser data, the completion status may be removed.
Why is my score not reflected in the global TOP10 immediately?
Network delay or API response timing can sometimes cause short delays. Please try again after a moment.
Do I need to be good at math to play Sudoku?
No. Sudoku is a logic puzzle, not a math calculation game.