1. Sudoku method: When there is only one space left in a row, a column or a palace on the Sudoku disk, find out the missing numbers by counting and fill in the spaces.

Look at the picture. According to the rules of Sudoku, the numbers in each row cannot be repeated. If you look at line D, the number 1, 4,3 already exists, so the remaining number is 2, which means D4=2. Similarly, looking at the column 1, we find that there are already numbers 2, 4 and 1, so the remaining number is 3, that is, C 1=3. Look at the first palace. There are already numbers 2, 1 and 4 in the palace, so the remaining number is 3, which means B2=3.

2. Pairing of three numbers: In some cases, three numbers may appear in pairs. For example, Sudoku, a row or a column may have only three spaces left, and these three spaces can only be filled with three specific numbers.

In Sudoku, there are only three spaces in each row and column. Therefore, when there are only three spaces left in a row or column, these three spaces can only be filled with three specific numbers. For example, in the above example, (5,3) and (6, 1) can only be filled with the numbers 7 and 5.

3. Sequential recursion: Find out the hidden sequence in Sudoku through observation and reasoning.

Find out the hidden sequence in Sudoku through observation and reasoning. For example, if (4,3) is filled with 6, then (4,9) and (9,3) can only be filled with 9 and 4 respectively, while (9,9) needs to be filled with 6. Conversely, (4,9) and (9,3) should be filled with 6, and (4,3) should be filled with 9.

Understand the function of Sudoku:

1, improve logical thinking: Sudoku requires players to reason according to the existing numbers and judge the numbers that should be filled in the blanks. This constant reasoning process can exercise the player's logical thinking and reasoning ability. By constantly solving problems, the player's logical thinking ability will be gradually enhanced.

2. Enhance concentration: Sudoku requires players to pay close attention to observe and analyze the relationship between each number and the space. This focused process can exercise the player's concentration and improve the persistence of attention.

3. Improve math ability: The math concepts and computing ability involved in Sudoku games can also be improved. When solving Sudoku problems, players need to use basic mathematical concepts, such as addition, subtraction, multiplication and division, and some simple logical operations. This is helpful to consolidate and deepen the understanding of these mathematical concepts.

4. Enhance patience and perseverance: It often takes some time and energy to solve Sudoku problems, and players need enough patience and perseverance. When encountering difficulties, players need to remain calm and patiently look for a breakthrough. This helps to cultivate players' patience and perseverance.

5. Enhance spatial imagination: Sudoku requires players to construct the position and arrangement of numbers in their minds, which helps to enhance players' spatial imagination and geometric thinking ability.