On September 9th, International Sudoku Day celebrates the logic-based number-placement puzzle called Sudoku. It’s also a day to learn to play this fun number game.
Sudoku is comprised of a grid of little boxes called cells, stacked nine high and nine wide, totaling 81 cells. Players fill each row, column, and square with the numbers 1 through 9. The numbers cannot repeat within the row, column, or square. Also, a Sudoku grid already has some of the numbers filled in. The more spaces that are filled, the easier the game.
In 2013, the World Puzzle Federation officially established September 9th as International Sudoku Day. They believed September 9th was the most appropriate day since the game consists of a 9 x 9 grid of numbers.
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