INTERNATIONAL SUDOKU DAY
Fast Facts
- CELEBRATION
- Honors the classic, logic-based number-placement puzzle
- CELEBRATED
- Each year on September 9
- CREATOR
- Founded in 2013 by the World Puzzle Federation
- VIBE
- Logic, brain health, relaxing
INTERNATIONAL SUDOKU DAY
Celebrated every year on September 9th, International Sudoku Day honors the classic, logic-based number-placement puzzle enjoyed by millions around the globe. Whether you are a lifelong solver or a complete beginner, it is the perfect day to challenge your brain with a new grid.
#InternationalSudokuDay
Sudoku is played on a 9x9 grid divided into nine 3x3 sub grids, totaling 81 individual cells. The goal of the game is to fill every row, column and 3x3 box with the numbers 1 through 9. No number can repeat within the same row, column, or 3x3 box. Every puzzle comes with pre-filled numbers and the more numbers provided at the start, the easier the puzzle is to solve.
While Sudoku feels like a modern phenomenon, its origins span centuries and continents, dating to the 18th century.
The Evolution of Sukuko
18th Century
Swiss mathematician Leonhard Euler created Latin Squares, a mathematical concept that laid the foundation for number-grid puzzles.
Late 19th Century
In 1895, French newspapers began publishing early variations of number-placement puzzles.
1979
Freelance puzzle creator Howard Garns designed the modern version of the game. Titled Number Place, it was first published in Dell Pencil Puzzles and Word Games.
1984
The puzzle was introduced to Japan, where it received the name Sudoku, which translates to "the digits are limited to one occurrence." Because the Japanese writing system is less suited for traditional crosswords, number puzzles quickly exploded in popularity, growing into a industry selling over 600,000 magazines monthly.
1997-2004
Wayne Gould, a retired judge from New Zealand, discovered Sudoku in a Tokyo bookstore and developed a computer program to generate new puzzles. He successfully pitched the puzzle to major newspapers like The Times (London) and The Conway Daily Sun (New Hampshire) in 2004, triggering a worldwide craze.
HOW TO OBSERVE #InternationalSudokuDay
The best way to observe this day is to play Sudoku. If you don’t know how it’s an easy game to learn. Once you’ve played it, teach the game to someone else. You will find this game to be totally relaxing. Besides providing a temporary escape, Sudoku is fun for all ages and might even help keep your brain healthy. Also, if you have a song stuck in your head, Sudoku is a proven way to stop the song from replaying in your mind. Be sure to share this fun day on social media with #InternationalSudokuDay.
Beyond being a fun and engaging pastime, playing Sudoku offers several great benefits:
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It exercises logical reasoning and helps keep your brain active, which benefits mental health.
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Provides a calming, meditative break from daily distractions.
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Helps with focusing and critical thinking.
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Pick up a puzzle, teach a friend how to play, and share your completed grids on social media using #InternationalSudokuDay.
INTERNATIONAL SUDOKU DAY HISTORY
International Sudoku Day was officially established in 2013 by the World Puzzle Federation. They believed September 9th was the most appropriate day since the game consists of a 9 x 9 grid of numbers.
