| FREE
ONLINE SUDOKU PUZZLES |
Sudoku is a logic-based
number placement puzzle. The objective is to fill a 9×9
grid so that each column, each row, and each of the nine 3×3
boxes (also called blocks or regions) contains the digits from
1 to 9 only one time each. The puzzle setter provides a partially
completed grid. Completed Sudoku puzzles are usually 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. The modern puzzle was invented by an American architect,
Howard Garns, in 1979 and published by Dell Magazines under
the name "Number Place". It became popular in Japan
in 1986, after it was published by Nikoli and given the name
Sudoku, meaning single number. It became an international hit
in 2005. |
