How to Solve Sudoku

A Beginner’s Guide

Sudoku is a logic puzzle that uses numbers instead of math. You do not need to add, subtract, or calculate anything — you only need careful thinking and observation.

The Goal

Fill in the empty squares so that:

Every row contains the numbers 1 through 9 once each

Every column contains the numbers 1 through 9 once each

Every 3 × 3 box contains the numbers 1 through 9 once each

No number can repeat within a row, column, or box.

Understanding the Grid

A Sudoku puzzle has:

9 rows (left to right)

9 columns (top to bottom)

9 smaller boxes made up of 3 × 3 squares

Some numbers are already filled in. These are your clues.

Your job is to complete the rest using logic.

Step 1: Look for Easy Wins

Start by scanning the puzzle.

Ask yourself:

Which rows already have many numbers?

Which columns are nearly complete?

Which boxes are missing only a few numbers?

The more numbers already placed, the easier it is to find the missing one.

Step 2: Find Missing Numbers

Choose one empty square and check:

Row — Which numbers are already used?

Column — Which numbers appear here?

Box — Which numbers are inside the 3 × 3 section?

The correct number must be the one not already used in any of those three places.

Step 3: Use the Process of Elimination

Example:

If a square’s row already has:
1, 3, 5, 7, and 9

and its column contains:
2 and 6

then the only possible numbers left are:
4 or 8.

Keep checking nearby squares until only one number fits.

Step 4: Work Slowly Around the Puzzle

Sudoku is like solving a chain of small clues:

Filling one square helps solve another.

Each correct number makes the puzzle easier.

Move around the grid instead of getting stuck in one spot.

Step 5: Pencil Marks (Optional but Helpful)

Many players lightly write possible numbers in empty squares.

As you discover new numbers, erase possibilities that no longer work until only one remains.

Helpful Tips

✔ There is only one correct solution.
✔ Guessing is not necessary.
✔ If stuck, look at a different row or box.
✔ Accuracy matters more than speed.
✔ Practice makes puzzles easier and faster.

Remember

Sudoku is meant to be relaxing and rewarding. Take your time, enjoy the process, and celebrate each completed puzzle!