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What Is Sudoku Puzzle?

One of the most popular games, sudoku, is a logic-based number placement puzzle. The objective of classic sudoku is to fill the 9 × 9 grids with numbers from 1-9 such that no digit repeats in each row or column of the grid. French newspapers published variations of the sudoku puzzles in the newspaper in the 19th century. Sudoku gained worldwide popularity in 1986. Japanese puzzle company Nikoli started publishing Sudoku in the name of ‘single number’. Sudoku doesn’t require math skills; only brain and concentration are needed to solve sudoku.

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