Sudoku is a logic game that is played solo. It consists of completing a grid of 81 cells with numbers from 1 to 9. Be careful! The same number appears only once in a row, once in a column and once in a zone. Sudoku exists in a giant version, but also in a version for children.

**Table of Contents**Unshow

**The grid**

- The grid of a classic sudoku consists of 81 cells, 9 columns and 9 rows.
- The grid is then divided into 9 zones.
- A zone consists of 3 rows and 3 columns.
- An area, a column and a row contain numbers from 1 to 9.
- A number does not appear twice in the same area, column and row.

**How do you play?**

- At the beginning of the game, the grid is partially filled.
- Proceed by elimination.
- Start with a number and see in which row or column it already appears.

*Example:*

*Let’s start with the number 1.*

*It already appears in rows 2 and 3.*

*It can therefore only appear in row 1.*

*It already appears in fields 1 and 2.*

*It can therefore only appear in field 3*

- Look at the rows or columns where only one digit is missing.

*Example:*

*The blue column is missing only one number, which is “3”.*

If there are several possibilities, you can write the numbers in the corner of the box and eliminate them as you go along.

*Example:*

*The last column is missing 2 numbers: 1 and 7.*

*The red lines mark the boxes where the number 1 cannot appear.*

*The blue lines mark the cells where the number 7 cannot appear.*

*By elimination, the number 1 occupies the entire second row.*

*The number 7 will naturally occupy the last free square and complete the column.*

**End of the game**

- The game ends when all the squares are completed.

**Variant**

- There is a 16 square sudoku for children.
- There is a giant 256-square sudoku for adults.