The key to the Sudoku game is that in the nine-square grid, each grid has a different number. The nine numbers in each row and column are also different. In this way, all the game has to do is perform an exclusive analysis of the numbers.
Since the development of the Sudoku game, with the active exploration of Sudoku enthusiasts, there are many algorithms for solving Sudoku, including the rectangular vertex deletion method, the key number deletion method, etc. Solving a Sudoku problem is a combination of one or more methods, in order to enable players to solve Sudoku problems step by step and continuously improve their ability to solve Sudoku problems in the process of solving Sudoku.
Sudoku was formerly known as Jiugongge, which originated in China. Thousands of years ago, our ancestors invented the Luo Shu. Its characteristics are more complicated than the current Sudoku. It requires that the sum of the three numbers vertically, horizontally, and diagonally is equal to 15, instead of the simple nine numbers that cannot be solved. repeat. The "Nine Palaces Picture" in the ancient Chinese Book of Changes is also derived from this, so it is called the "Luoshu Nine Palaces Picture". The name "Nine Palaces" has been preserved and is still used today due to the important position of the Book of Changes in the history of Chinese cultural development.