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Notes
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If you are a newbie to the Sudoku world, there is nothing to be ashamed about. This game is very logical and easy to get. There are 3 basic rules and depending on the type you choose there might be alterations, however, the basic rules set rarely change.
Filling in a 9×9 grid, so that each column, row, and 3×3 section contain the digits between 1 to 9. Traditionally there is no time limit, but some Sudoku games for the brain add time limitations that push to think quicker.
When you start, some squares of the 9×9 grid will already have digits. Your task is to use your brainpower to fill in the missing spots and complete the grid.
Any row has two same numbers
Any column has two same numbers
Any 3×3 grid has two same numbers
Each digit from 1 to 9 can be used just once in a row, column, or 3×3 grid