Standard Sudoku is a familiar type of Sudoku. Compared with various dazzling deformed Sudokus, it is easier to get started and is also the basis of deformed Sudoku. You can certainly solve the problem by mechanically selecting numbers by marking a large number of candidates, or simply guessing the numbers, but you will definitely lack the fun of thinking. "49 Techniques of Standard Sudoku" combines the board to introduce the various techniques of standard Sudoku. There are commonly used ones that you are familiar with, and there are also ones that you have never heard of, and even understanding them requires some thinking. But isn't the real fun of Sudoku just discovering the rules and mastering the skills? Don't you feel that you have to test yourself by solving problems? Therefore, the author has also prepared questions of various difficulties for you. You can practice the questions while learning the skills, or you can take on the challenge after understanding the various skills.
