Learn how to play Sudoku 9×9 simply and easily. Discover the rules, board structure, quick solving tips for beginners. Train your brain every day!
9×9 Sudoku is the most popular variant of the Sudoku puzzle — a logic-based game that is both challenging and highly enjoyable. If you’re new to Sudoku or curious about how 9×9 Sudoku works, this guide will help you understand the gameplay and basic rules clearly.
Structure of a 9×9 Sudoku grid
A 9×9 Sudoku board consists of:
- 9 horizontal rows
- 9 vertical columns
- 9 3×3 boxes (also called regions or blocks)
In total, the grid contains 81 cells. Some of these cells are pre-filled with digits from 1 to 9. Your task is to fill in the remaining cells so that no number repeats in the same:
- Row
- Column
- 3×3 box
Basic rules of 9×9 Sudoku
Sudoku requires no math or calculations — it’s entirely based on logical reasoning. The rules are simple:
- Each number from 1 to 9 must appear only once in every row, column, and 3×3 box.
- You cannot change or erase the numbers that are already pre-filled in the puzzle.
The goal of Sudoku
The objective is to completely fill the grid while following all the rules. Once the board is filled correctly and no rules are violated, you win the game!
Tips for beginners
- Start with easier areas: Look for 3×3 boxes that already have more numbers filled in.
- Scan by rows and columns: Use the known numbers in rows and columns to determine what’s missing.
- Use notes: Write small candidate numbers in empty cells when you’re unsure.
- Apply elimination logic: If a number can’t go in certain cells, eliminate it as a possibility.
Why is 9×9 Sudoku so popular?
- Suitable for all age groups
- Enhances logical thinking and concentration
- Offers multiple difficulty levels from easy to hard
- Can be played online anytime, anywhere
You can start playing 9×9 Sudoku RIGHT HERE to train your brain every day!
