# How do we play Sudoku?

By luckyabu

@luckyabu (336)

India

3 responses

@maevic (821)

• Bahrain

23 Nov 06

it's easy on logic but difficult to execute.
How to Play Sudoku?
Sudoku requires no calculation or arithmetic skills. It is essentially a game of placing numbers in squares, using very simple rules of logic and deduction. It can be played by children and adults and the rules are simple to learn.
Sudoku Objective
The objective of the game is to fill all the blank squares in a game with the correct numbers. There are three very simple constraints to follow. In a 9 by 9 square Sudoku game:
Every row of 9 numbers must include all digits 1 through 9 in any order
Every column of 9 numbers must include all digits 1 through 9 in any order
Every 3 by 3 subsection of the 9 by 9 square must include all digits 1 through 9
Similarly, smaller Sudoku puzzles, such as the 4x4 puzzle, must have the numerals 1 through 4 in each row, column and subsection. Larger Sudoku games (16 by 16) must have numerals 1 through 16 in each row, column and region. The principles are the same whatever the size of the game.
Every Sudoku games begins with a number of squares already filled in, and the difficulty of each game is largely a function of how many squares are filled in. The more squares that are known, the easier it is to figure out which numbers go in the open squares. As you fill in squares correctly, options for the remaining squares are narrowed and it becomes easier to fill them in. The Sudoku games on SudokuDaily.net let you check your progress as you go, to help prevent going down a wrong path.
Also check this site:
http://en.wikipedia.org/wiki/Sudoku

1 person likes this

@nzk786 (453)

• India

24 Nov 06

Sudoku (?? sudoku?), also known as Number Place or Nanpure, is a logic-based placement puzzle. The object is to fill the grid so that every column, every row and every 3×3 box contains the digits 1 to 9. The puzzle setter provides a partially completed grid so that there is only one solution.
Completed Sudoku puzzles are a type of Latin square, with an additional constraint on the contents of individual regions. Leonhard Euler is sometimes (incorrectly) cited as the source of the puzzle, based on his work with Latin squares[1].
The modern puzzle was invented by an American, Howard Garns, in 1979 and published by Dell Magazines under the name "Number Place"[2]. It became popular in Japan in 1986, when it was published by Nikoli and given the name Sudoku. It became an international hit in 2005