Fill every row, column, and 3×3 box with the digits 1 through 9 once.
How to Play Sudoku for Beginners: Rules, Examples, and Your First Puzzle
Learn the three Sudoku rules, see how a beginner move works, and try a guided board before you start a full puzzle. Sudoku uses logic, not arithmetic. If you already know the basics, you can play Sudoku online with hints, notes, and fresh difficulty levels in Pure Sudoku.
Use this guide for the rules, then open the free Sudoku browser game to practice on a real board.
Use the starting numbers to eliminate impossible choices. Place only numbers you can prove.
Start where the grid is most complete, then rescan after each safe placement.
Practice Sudoku Rules in Real Time
Tap any highlighted square in the interactive board below to see how the rule of "one through nine in every row, column, and box" plays out. Every empty spot in this puzzle is a simple single, so you can focus on the logic rather than guesswork.
Guided Sudoku board
Tap a blank cell, then press a number or use your keyboard to try a move.
What to watch for
- Scan columns first. Every open square on this board is forced by column logic.
- Use the hint button to jump to the next logical move when you are unsure.
- Notice how duplicates instantly create a conflict highlight—no guessing needed.
- Once the board is full, celebrate and grab a harder Daily Sudoku.
Teaching someone else? Pair this demo with our Sudoku solving strategies guide, download a printable Sudoku PDF, or open easy Sudoku for a slower warmup.
Sudoku Basics: The Three Golden Rules
Sudoku uses a 9×9 grid broken into nine 3×3 boxes. Every puzzle follows the same foundational rules, no matter the difficulty.
- Rows: Each row must include the digits 1 through 9 exactly once.
- Columns: Each column also needs the digits 1 through 9 with no repeats.
- Boxes: Each 3×3 box must contain the digits 1 through 9 one time apiece.
When a number already appears in a row, column, or box, you can eliminate it as a possibility elsewhere in that unit. Most beginner puzzles fall just by repeating this elimination pattern plus a few easy strategies like "naked singles" and "hidden singles." This tutorial board is full of naked singles you can spot just by scanning each column.
Step-by-Step Method for Beginners
Use this repeatable checklist each time you open a new Sudoku board.
- Start with givens. Look for rows, columns, or boxes that are almost complete.
- Mark candidates mentally. Even if you do not jot pencil marks, think through the digits that still fit.
- Place singles immediately. If only one digit can occupy a square, place it and keep moving.
- Rescan after every move. New placements often unlock more singles nearby.
- Use advanced tactics if needed. For tougher boards, add strategies like pairs, pointing sets, or X-Wing.
Once this flow feels natural, use Pure Sudoku to practice a complete beginner board, then try the multiplayer Sudoku mode to see how your solve speed compares to friends in real time.
Beginner Mistakes to Avoid
- Guessing too early: Sudoku is a logic puzzle. If you feel stuck, double back and rescan instead of guessing.
- Ignoring the 3×3 boxes: New players often check only rows and columns, but boxes provide equal information.
- Rushing pencil marks: On paper, sloppy notes cause contradictions. Keep them neat or use Pure Sudoku’s smart notes.
- Skipping difficulty labels: Warm up with an Easy Sudoku before trying Hard or Expert boards.
FAQ: How to Play Sudoku
How do you play Sudoku?
Fill every empty square so each row, column, and 3×3 box contains the digits 1 through 9 exactly once. The starting numbers are clues; each move should follow from those clues.
How long does it take to learn Sudoku?
Most people grasp the rules after one or two guided puzzles. Solving faster simply requires repetition. Use our Daily Sudoku to build a streak and watch your average time drop.
What is the best first move?
Start with the unit (row, column, or box) that has the most givens. On many puzzles you can fill several digits before you ever need a pencil mark.
Can kids learn with this tutorial?
Absolutely. The interactive board uses large touch targets, conflict highlights, and optional hints, making it perfect for classrooms or family game night.
Do you need math to play Sudoku?
No. Sudoku uses numbers as symbols. You are not adding or multiplying them; you are checking which digit can legally fit in each row, column, and 3×3 box.
Where should beginners practice after learning the rules?
Start with Pure Sudoku on easy difficulty. The free Sudoku browser game gives you notes, hints, and conflict checks without making you download anything.
Keep practicing with more Sudoku resources
Move from this tutorial into fresh boards, strategy guides, or printable worksheets to lock in the basics.