How do you play Sudoku?
If you are searching for sudoku how to play, the short answer is this: choose an empty cell and place a number from 1 to 9 only when that number does not repeat in the same row, column, or 3x3 box. A Sudoku game is solved when every empty cell is filled and all three checks are still true.
The 3 basic rules of Sudoku
Standard Sudoku has three simple rules. Every row must contain 1 through 9, every column must contain 1 through 9, and every 3x3 box must contain 1 through 9. A number can appear only once in each row, column, and box.
Each row contains 1-9 once
Each column contains 1-9 once
Each 3x3 box contains 1-9 once
How to start a Sudoku puzzle
Start by scanning rows, columns, or boxes that already contain many numbers. Write down which numbers are missing, then check each empty cell against its row, column, and box. If only one number can fit, place it.
- Choose a row, column, or 3x3 box with many given numbers.
- List the missing numbers from 1 to 9.
- For each empty cell, remove numbers already present in its row, column, or box.
- Place a number only when logic leaves one possible answer.
How to play Sudoku for beginners
Beginners should not try to solve the whole Sudoku puzzle at once. Start with an easy Sudoku game, look for the most complete row, column, or box, and ask: which numbers are missing, and which cells can legally take each missing number? This step-by-step habit is the safest way to learn how to play Sudoku without guessing.
- Start with easy puzzles rather than hard or expert puzzles.
- Use notes for possible numbers when one answer is not certain.
- Check row, column, and box before every move.
- Use hints to learn the reason behind a move, not just the answer.
Step-by-step example for beginners
Imagine a row already has 1, 2, 4, 5, 7, 8, and 9. The only missing numbers are 3 and 6. If one empty cell is in a column that already contains 6, that cell cannot be 6. Therefore it must be 3.
Beginner logic pattern
Missing numbers in the row: 3 and 6. The column blocks 6. The answer is 3.
9x9 step-by-step Sudoku example
This small 9x9 example shows how a beginner move works. The first row is missing only 3 and 6. The highlighted empty cell is in a column that already contains 6, so 6 is blocked. That leaves 3 as the only logical answer.
- Step 1: In the first row, the missing numbers are 3 and 6.
- Step 2: The highlighted cell shares a column with 6, so it cannot be 6.
- Step 3: The only remaining number is 3, so this cell should be 3.
Common beginner mistakes
- Guessing too early instead of using elimination.
- Checking only the row and forgetting the column or 3x3 box.
- Changing given numbers that are part of the original puzzle.
- Moving too fast and missing an obvious single.
Sudoku is sometimes misspelled as sudoko, sodoku, or suduko, but the rules are the same: fill the grid with logical deductions.
Sudoku instructions in one minute
These are the basic Sudoku instructions: use numbers 1 to 9, do not repeat a number in any row, do not repeat a number in any column, and do not repeat a number in any 3x3 box. When a cell has only one legal number left, fill it in. That is how Sudoku works at the beginner level.
Practice with a free online Sudoku puzzle
The best way to learn is to solve an easy puzzle slowly. Use the hint system when you are stuck, then read the explanation before moving on.
FAQ
How do you play Sudoku?
Fill the empty cells with 1 to 9. Each row, column, and 3x3 box must contain every number once.
How do you play Sudoku for beginners?
Start with easy puzzles, scan the most complete areas first, and use elimination before writing a number.
How do you play a Sudoku game step by step?
Pick a nearly complete row, column, or box, list the missing numbers, remove blocked options, then place a number only when one choice remains.
Is Sudoku a math game?
No. Sudoku uses numbers as symbols, but solving it requires logic rather than arithmetic.
Should beginners use pencil marks?
Yes. Pencil marks help you track possible numbers and avoid guessing.
What puzzle should I play first?
Start with easy Sudoku puzzles. They have more given numbers and usually require only basic elimination.
Is Sudoku hard to learn?
No. Sudoku is easy to learn because the rules are simple. It becomes more challenging as puzzles require more advanced solving techniques.
What is the first move in Sudoku?
The best first move is usually in a row, column, or 3x3 box with many given numbers. List the missing numbers and use elimination to find a certain cell.
Next step
If you understand the goal, read the dedicated rules page to make each constraint clear before solving faster puzzles.
Sudoku Rules Explained