How to do Sudoku video tutorial

Practice of Sudoku Video Tutorial: Practice of Sudoku

Sudoku (shdú) is a mathematical game, which originated in Switzerland in the18th century. It's a logic game with paper and pen. Players need to infer the numbers of all remaining spaces according to the known numbers on the 9×9 disk, and ensure that the numbers in each row, column and thick line palace (3*3) contain 1-9, which is not repeated.

Sudoku is nine palaces, and each palace is divided into nine squares. Give some known numbers and problem-solving conditions in this eighty-one box, and use logic and reasoning to fill in the numbers of 1-9 in other blanks. Make each number of 1-9 appear only once in each row, column and palace, so it is also called "Jiugongge".

Since the word "Sudoku" is "number", people often associate it with mathematics, so let's start with the well-known mathematician Euler. Whenever players who want to know the history of Sudoku search in the Internet and books, they will always mention Euler's "Latin side".

Latin rules: each row and column contains 1-N(N is the disk size), which is not repeated. This is very similar to the standard Sudoku mentioned above, but it lacks a palace rule.