Sudoku gained massive popularity post-2004. But the concept dates back to nearly 4000-years-old ancient Chinese puzzle called Magic Squares. Since then, it has travelled a long way. And here are some more fun facts about the game.

Fun Fact #1 – Sodoku or Sudoku?
The spelling of the game Sudoku is often confused with the term Sodoku which refers to bacterial disease, a.k.a. Rat-bite fever.

Fun Fact #2 – Sudoku isn't a number puzzle
Sudoku is a logic puzzle. Numerical digits only make the game culturally independent and convenient. The cells can also be filled with alphabets, shapes, pictures, or figures.

Fun Fact #3 – You'll never run out of Sudoku puzzles
There are around six sextillion Sudoku free puzzles and you can never run out of them. These are enough for you to do one each day until the next century.

Fun Fact #4 – Japanese name, an American invention
The term Sudoku is certainly of Japanese origin, but the game is an American invention. Sudoku got to the forefront by Howard Garns in 1979, but it was named as Sudoku by Nikoli in Japan around five years later.

Fun Fact #5 – Sudoku championships
It's no ordinary logic puzzle. The very first Sudoku Championship was held in 2006. Since then, it's been happening in different locations every year. Thoman Snyder is a three-time World Sudoku Championship winner and has also completed a very easy difficult Sudoku in just 1:23 minutes. Besides, two hundred students had set a Guinness World Record by solving a massive multi-Sudoku puzzle consisting of 280 standard grids in 2018.

Fun Fact #6 – There's are uncountable Sudoku players worldwide
Sudoku is globally famous and no one precisely knows how many people play it. Having exact numbers is nearly impossible since it's played on all platforms all around the globe.

Fun Fact #7 – There's no math to Sudoku
The digits are the only mathematical symbol to the game, but there's no calculation or an analytical approach to playing Sudoku. It's purely logic-based - no guesswork as well!

Fun Fact #8 – Sudoku isn't unsolvable
Sudoku free puzzles have one and only one unique solution. Sudokus aren’t unsolvable – they're just tricky and might have exhausted your solving techniques. Also, one that offers multiple solutions isn't probably a Sudoku but looks like one.

Fun Fact #9 – Flight attendants can't solve Sudoku
Sudokus are addictive and also distracting, and a flight attendants' job is to pay attention to the passengers. Hence British Airways forbids its attendants from playing Sudoku free puzzles during take-off and landing.

Fun Fact #10 – It popularized only after 2004
Howard Garns got the game published in the Dell Magazine by the name Number Place. It took off in Japan 5 years later as Sudoku. But it was only post-2004 that Sudoku witnessed a global outbreak. It broke all records when Wayne Gould computerized the game. Since then, there's no looking back, and today it's a staple in every house.

Sudoku free puzzles aren't just restricted to newspapers or magazines. These have excellently transitioned on smartphones and are everyone's solo favorite pastime to date.