Sudoku is a popular number-placement puzzle game that has been around for decades. It is a great way to exercise the mind and improve problem-solving skills. The objective of the game is to fill in a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 subgrids contains all of the digits from 1 to 9.

Sudoku can be played both online and offline, making it an ideal pastime for people who want to challenge themselves mentally without having to leave their homes. With its simple rules and addictive gameplay, Sudoku can be enjoyed by players of all ages and skill levels.