Solving a Su-doku puzzle can be extremely tricky; however, the rules of the game are pretty simple. Su-doku is a grid of 9-by-9 squares made up of nine 3-by-3 regions. Some of the regions numbers are given. Solving a Su-doku puzzle does not require knowledge of mathematics. The goal is to fill in the empty square, so that each column, row, and region contains the numbers 1 through 9 exactly once. Features Download trial version Purchase Su-doku Rain v1.0 What is Su-doku? Sudoku (sû-do-ku), also known as Number Place, is a logic-based placement puzzle. The aim of the puzzle is to enter a numerical digit from 1 through 9 in each cell of a 9×9 grid made up of 3×3 subgrids (called "regions"), starting with various digits given in some cells (the "givens"); each row, column, and region must contain only one instance of each numeral. Completing the puzzle requires patience and logical ability. (wikipedia.org)