Sudoku+by+Jilly

In Japanese, "Su" means number and "Doku" relates to the place on the puzzle that each Su fits into. Leonhard Euler was a Swiss mathematician in the 18th century and he developed the concept of "Latin Squares," which is where numbers in a grid appear only once, across and up and down. In the late 1970's, Dell Magazines in the US started to publish puzzles using Euler's concept but with 9x9 square grids. In the mid 80's, Maki Kaji (president of the Japanese puzzle giant "Nikoli") pushed the company to publish a different version of the game and named it Sudoku. They refined it by limiting the number of given numbers to 30 and having them appear symmetrically. The game because very popular in Japan and increasingly more popular around the world. While the 9x9 grid is the most common verion of Sudoku, there are many different types of the game. There are 4x4, 5x5, 6x6, 7x7, 16x16, 25x25, and some even spell words in their final solutions. "The game of Sudoku is a fun and challenging way for people of any age and culture to hone their logical and deductive abilities." Try the Daily Puzzle and learn more at: http://www.sudokudaily.net/puzzle/.