How to Play Suduko

The Suduko puzzle most of the times is a 9×9 grid. This grid is made up of 3×3 sub grids with bolded borders called regions or blocks or boxes. So there are a total of eighty one square boxes that make the Suduko, some of these boxes contain numbers (the numbers most commonly used are 1-9) while most of them are eampty. The final goal of the game is to put a number in each cell so that each column, row, and region contains the numbers from one to nine (1–9) exactly once. So, each row, column and three by three region (block) should include all of the numbers from 1 to 9 and none of these numbers should appear more than once.

This is just the most common form of Suduko that you will come across, there are a lot of other variations where more than nine numbers are used or that the regions aren larger or smaller than 3x3 squares or are not even squares. However most of these variations are in most cases harder to solve and for more experienced users and they are not that easy to find.

As a matter of fact, you can find Suduko puzzles that instead of numbers are made from characters like symbols or letters. However, those are not that common. Numbers are mostly used for convenience reasons, any set of 9 symbols or special characters and letters can be used for creating a Suduko.

To sum up the rules of suduko:

• Everyone of the rows must contain all the numbers from 1 to 9
• Everyone of the  columns must contain all the numbers from 1 to 9
• Every 3x3 small square (region) must contain all the numbers from 1 to 9