Sudoku
What is Sudoku?
Sudoku is a number-placement puzzle. You start with an almost empty puzzle, which has some of the cells already filled with numbers. Your objective is to fill in the rest of the empty cells. According to the Sudoku rules, a number can appear only once in every row, column, or region (3X3).
What is so interesting about it?
Sudoku stimulates the brain and is highly addictive. Unlike traditional word puzzles, which require prior knowledge, Sudoku uses numbers and logic. This lack of a language barrier helps explain Sudoku's popularity world-wide.
Sudoku history
Puzzles similar to Sudoku first appeared in France in 1892. However, the modern version was invented in 1979 in the USA. Sudoku was introduced in Japan in 1984, and that is where it got its name, which means "single digit." Sudoku first became popular in the rest of the world when it appeared in British newspapers in 2004. Since then, it has become a global phenomenon.
How do I start a Sudoku puzzle?
The easiest way to begin is to choose a number and try to fill in all the places in the puzzle where it must appear, according to the Sudoku rules. When you finish dealing with the first number, choose another number. Repeat these steps for all the numbers from 1 through 9. As the puzzle starts to fill, you will find new places to fit the earlier numbers, so you may go back to those other numbers and place them in the grid. At the end there will be no empty boxes left, and the puzzle will be complete.
Now what?
Now go ahead! try to solve a Sudoku puzzle by yourself! have fun...
sui/sz
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