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How to Create a Sudoku Puzzle Manually

How to Create a Sudoku Puzzle Manually

Though the Sudoku puzzle was invented in the 1970s in the United States, it first became popular in Japan. In the last decade, this mind-boggling number puzzle has gained immense popularity among the people of the United States. It is very often found in newspapers, magazines, etc. If you are a hard-core Sudoku fan and […]