Sudoku is a number game in which missing numbers are to be filled into a 9 by 9 grid of squares which are subdivided into 3 by 3 boxes so that every row, every column, and every box contains the numbers 1 through 9.

Here are some *interesting* facts about Sudoku:

- You don’t need to be an expert to make a Sudoku puzzle. Anyone with basic logical reasoning can make a Sudoku puzzle within minutes.
- Yes, there is a minimum number of clues to be given for the Sudoku puzzle has one solution. The least number of clues of a given Sudoku with a unique solution is 17.
- There are 6670903752021072936960 Sudoku grids. However, the essentially different Sudoku grids are only 5,472,730,538. Needlessly to say, you need a handful of lifetimes to solve all of them.
- Sudoku is a logic game and involves absolutely no math or language skills.
- Actually, Sudoku isn’t a Japanese game it all. It’s American invented. Howard Garns created it as Number Place in 1979 but died in 1989 before Japanese publisher Nikoli got a hold of it. The game didn’t really take off until 2004 though when Wayne Gould convinced The Times in London to publish it.
- When Sudoku became a world hit in 2005, it is estimated that it is the biggest phenomenon since the Rubik’s Cube in the 1980s.
- There is a worldwide Sudoku Championship every year since Mar 2006. The first World Sudoku Championship was held in Lucca, Italy.
- Playing Sudoku regularly can have benefits, like boosting your concentration and focus, preventing or easing depression and possibly even preventing dementia and Alzheimer’s disease, according to some studies.
- Sudoku is good for anyone and any age and helps develop mental abilities as well as keeps them in good condition.
- Sudoku is considered highly addictive, but since there aren’t any harmful side effects (and in fact a list of great side effects), go right ahead and get addicted!

Some of the facts are from this article.

*Related*

## Author: ZZ

Yaling Zheng, Ph.D., founder of https://www.createclassicsudoku.com, received a doctorate degree from the University of Nebraska-Lincoln, where her studies focused on constraint programming and machine learning. She lives in Greater Cleveland/Akron.
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