Sudoku is a logical number fill-in-the-blank game, derived from the Latin square created by a Swiss mathematician in the 18th century. The game was introduced by an American magazine in the 1970s under the name "Number Place" and was later repackaged by a Japanese magazine in 1984 under the name "Sudoku," making it popular around the world.

game rules:
The gameplay of Sudoku is based on a 9x9 grid, divided into 9 small 3x3 grids. When the game starts, some of the grids have already been filled with numbers. These numbers are integers between 1 and 9. The player's task is to use logical reasoning to fill the remaining spaces with numbers 1 to 9 while ensuring that the following two conditions are met:
Each row is filled with a different number 1 to 9.
Each column and each small 3x3 grid must also contain unique numbers 1 to 9.

Game difficulty:
Sudoku games come in various difficulty levels, usually determined by the number of initially filled-in numbers. The fewer numbers filled in, the fewer clues left for the player and the more difficult the game becomes.

Game benefits:
Sudoku is not only a form of entertainment, it can also exercise players' logical thinking skills, improve their ability to concentrate, and help enhance problem-solving skills.

Popularity of Sudoku:
Sudoku is very popular around the world, not only as a common crossword puzzle in newspapers and magazines, but also in various forms such as specialized Sudoku books, online games, mobile apps, and tabletop games.

The charm of Sudoku lies in its simplicity and challenge, making it suitable for players of almost all ages. Whether you're looking for a few minutes of quick entertainment or a lengthy mental challenge, Sudoku has you covered.