Play Click Sudoku

Welcome to ClickSudoku!

Sudoku has been taking the world by storm and now you can play for free on ClickSudoku.  We offer new Sudoku games every day.  You can play the classic version of Sudoku or try your hand at a timed round of Pop Sudoku.  Or skip the numbers altogether and play a fun jeweled version called Ruby Sudoku.  There is no end to the fun you have playing Sudoku on ClickSudoku.

See for yourself how fun Sudoku can be without breaking out a pencil.  Whether you’ve been playing for years or are just beginning, ClickSudoku will be one of your favorite websites for playing Sudoku.

Challenge your mind today!

Don’t let the numbers confuse you, Sudoku is an easy to learn logic puzzle.  Once you’re hooked, mastering the art of Sudoku can prove to be an entertaining challenge.  The game is basically a grid that contains nine groups of blocks. Within each group of blocks there are nine individual cells.  Each row, column and block must contain the numbers “1” to “9”.  Each number may appear only once in any row, column or block.  The puzzle is set with a partially completed grid, which you must complete.  The puzzle is solved once you correctly fill the entire grid.

History of Sudoku

You might be tempted to believe that Sudoku has its origins in Japan given the Japanese name, but the puzzle’s origins are actually European.  Many games and puzzles are carried from one culture to another but Sudoku is different because it has truly evolved as it passed through each country to become a present day hybridized multi-cultural puzzle game. We’ll get to how it got its Japanese moniker later. 

It Begins in Switzerland

The Roots of Sudoku go back to a mathematical concept called Latin Squares which was developed by the 18th century Swiss mathematician, Leonhard Euler. The concept is a familiar grid where a set of symbols (or numbers) each occur exactly once in each row and exactly once in each column. Euler’s original design used Latin characters as the symbols, hence the name Latin Squares.

Next to France

Number puzzles began to appear in newspapers around the late 19th century. The early puzzles were based on the Latin Squares concept and were called Magic Squares. They first appeared in the Paris-based daily newspaper Le Siecle.  These puzzles were partially completed 9x9 grid with 3x3 sub-squares.  It was different from modern day Sudoku because it contained double-digit numbers and was solved through arithmetic computation rather than logic. It was similar to Sudoku in that each row, column and sub-square added up to the same number.  Le Siecle’s rival paper, La France, then published a puzzle that was similar to Magic Squares, but simplified the puzzle to contain only the digits 1-9.

Coming to America

Beginning in the late 1970's, the United States Dell Magazines began publishing the earliest known examples of what we call Sudoku puzzles.  It was called Number Place and was most likely designed by Howard Garns, an independent puzzle maker and retired architect from Indiana.  Dell Magazine published this puzzle for 25 years under the name Number Place.  It was with Dell Magazine that the Sudoku puzzle took its most recognizable form, but it was not yet the puzzle phenomenon it would later become.  It had some more travelling to do.

Turning Japanese

It wasn’t until the mid-1980s that the president of the Japanese puzzle giant Nikoli, Inc., Maki Kaji introduced the puzzle to Japan where it became a big hit. It was originally called, 'Suuji wa dokushin ni kagiru' roughly translated to mean the numbers must be unmarried or single.  The name was later shortened to Sudoku.  Nikoli made two refinements to the puzzle. First, the number revealed or given numbers was restricted to no more than 32, and second, puzzles appeared symmetrically.

Return to the West

It was nearly two decades before Sudoku would come to American soil in its current incarnation. But first it stopped over in The Times newspaper in London where it was offered as a daily puzzle at the behest of Wayne Gould, a retired Hong Kong judge.  He first discovered Sudoku in a Japanese bookshop and became fascinated by the puzzle.  Within a few months of its first appearance on British soil, the game became popular and spread to other British newspapers.  It wasn’t long until Sudoku Fever crossed the pond into the United States to become the phenomenon it is today.  Now nearly every US newspaper offers a Sudoku puzzle and if one game a day doesn’t satisfy your Sudoku urge, you can find puzzles published in compilation books and online on sites like this one.

True to its nature, Sudoku continues to evolve.  The 9x9 grid is still the most popular version, but there are now many variations of the game that are becoming popular.  There are simpler grids of 4x4 and more complicated grids of 25x25 for those of us who are truly addicted.  Some Sudoku puzzles use letters or symbols, like the Ruby Sudoku on ClickSudoku.  The future of Sudoku seems to be limited only by our human imagination and ingenuity.  However one thing seems certain, as long as Sudoku puzzles appear, there will be those of us compelled to use our logical and deductive skills to solve them.

Happy puzzling!