Sudoku

Sudoku is a an old logic puzzle game that was created in Japan over 1000 years ago. The goal of the game is to fill 9x9 square box with numbers. There are 9 3x3 square boxes in a large box, and each 3x3 square box can hold numbers from 1 to 9 (1,2,3,4,5,6,7,8,9) without repeating one number twice. That means that all 9 boxes must contain all numbers from 1 to 9, and the whole 9x9 box must contain each number from 1 to 9 nine times (9x1, 9x2, 9x3, 9x4, 9x5, 9x6, 9x7 ,9x8, 9x9). The 9x9 box also has 9 rows and 9 columns and each row and each column can hold numbers from 1 to 9 without repeating. When all squares are filled the puzzle is solved and the play time is recorded and then you are free so start another game of Sudoku.
There are three difficulty levels - easy, medium and hard. Each new game is unique and different game of Sudoku, allowing for variety every time you play.
This puzzle game allows you only the enter the numbers that are left to be entered into a tile, making it a very casual game of Sudoku!