Is Sudoku math?
No. Sudoku uses the symbols 1 through 9, but solving depends on logic and pattern checking rather than arithmetic.
Pure Sudoku
Start here
Sudoku for beginners starts with three simple checks.
Each row, column, and 3×3 box must contain 1 through 9 exactly once. You never need arithmetic—only careful scanning and elimination.
- Grid
- 9 rows × 9 columns
- Goal
- Digits 1 through 9
- Best first move
- Scan for singles
The three Sudoku rules
A number can appear only once in each row, each column, and each 3×3 box.
- Check the row before entering a digit.
- Check the column for the same digit.
- Check the 3×3 box; if all three checks pass, the digit is a valid candidate.
How to solve your first puzzle
Start with the fullest rows and boxes because they have fewer missing numbers.
- List the missing digits in one unit.
- Test each empty cell against its row, column, and box.
- Place a digit only when one location or one candidate remains, then scan again.
Beginner mistakes to avoid
Good habits keep a simple puzzle from becoming confusing.
- Do not guess when two candidates are still possible.
- Update pencil marks after every placement.
- If stuck, move to another row or box instead of forcing a move.
Continue playing
Choose your next Sudoku route.
FAQ
Quick answers before you play.
What difficulty should a beginner choose?
Start with Easy so the board offers frequent singles and clear scan opportunities.
Should beginners use notes?
Yes. Candidate notes are helpful when a cell has more than one possible value, but keep them updated after each placement.
Ready to solve?
Start an Easy puzzle
Open a clean Pure Sudoku board in your browser and put the guide into practice.