Sudoku is a number puzzle game that involves a 9x9 grid divided into 3x3 sub-grids. The objective of the game is to fill each row, column, and sub-grid with the numbers 1 to 9 without any repetition. The game starts with some numbers already placed in the grid, and the player's task is to fill in the remaining spaces with the correct numbers.
The sudoku rules are straightforward. Each row, column, and sub-grid must contain all the numbers from 1 to 9 without repetition. This means that each number can only appear once in each row, column, and sub-grid. The game can be played in varying levels of difficulty, with some puzzles requiring advanced strategies to solve.
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