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Sudoku also referred to as Su Doku or Number Place, is a simple and captivating game that's popularity is quickly spreading around the globe. Sudoku is a number puzzle, the aim of which the solver must enter a number from 1 through 9 in each cell of a grid. The grid is usually 9x9, divided into 9 3 x 3 sub grids(regions). The unsolved puzzle appears with a certain amount of numbers(known as "givens") already in place. To finish a puzzle one must use logic, as well as patience, to fill in each row, column and the region with only one instance of each number.