What is sudoku?

Sudoku is a location number based on logic than mathematics. Sudoku gained worldwide popularity at the beginning of 2005 and began to sell in the form of books of logical books, pocket electronic versions and board games, and also appeared in thousands of daily newspapers.

The sudoku concept is simple. The puzzle consists of a 9x9 square grid, which is divided into nine 3x3 squares, leading to nine rows and nine columns, a total of 81 small squares. Unresolved Sudoku puzzle gives only a few numbers in random squares. To solve the puzzle, the remaining squares must be filled with numbers 1 to 9, each appears only once in each row, column and square 3x3.

Since the sudoku is based on logic, other puzzles could be created that use the same concept and replace numbers with other objects such as colors, letters or shapes. Sudoku, however, is aptly named, because the word sudoku is a Japanese abbreviation freely means "sin of gle".

In its most basic form comes sudoku in the traditional 9x9 square grid with different levels of difficulty. The evaluation of difficulty for solving the puzzle is not based on the number of squares with supplied numbers, but rather on their location on the grid. These numbers are called givens . The complexity associated with the solution of puzzles is moving so that anyone can enjoy the Sudoku puzzle that parallel to their own level of abilities. There are some variants of puzzles in which the grid changes to contain multiple squares or are placed on the location of the numbers.

Although this concept of puzzles has been under many different names for years, the modern version has been popularized in Japan in 1986, when the publisher not discovered the puzzle originally published in Dell magazines as "Number Place". Not patented the word sudoku have been able to publish puzzles at different levelsDifficulty and in Japan have become very popular. In 2004, the international popularity of sudoku began when a puzzle was released in a British newspaper as a result of a computer program developed by Wayne Gouldlem, which could quickly create puzzles. From there, the popularity of puzzles eventually spread to the United States and elsewhere. The first sudoku championship took place in March 2006 in Italy Lucca.