• Sudoku consists of a 9x9 grid which is subdivided into 3x3 regions.
• The aim is to fill the whole grid with numbers from 1 to 9 so that the numbers appear exactly once in each row, column and 3x3 region.Example of correct row:
Example of correct column: Incorrect column:
Example of correct 3x3 region: Incorrect region:
• Each Sudoku shows some numbers as clues to help you deduce the ones missing in the rest of the cells. There is only one possible solution. Example: