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## 怎么玩 Sudoku

### 在线数独技巧

#### 填写候选人

“候选人”是一个适合某个位置的数字，即使其他数字也可能适合该位置。解决难题时，尝试用所有可能适合的候选人填补空白。您可以通过单击带有大黑点的按钮来执行此操作，然后将候选人添加到该位置。候选人将显示为很少的数字。许多初学者不会费心使用候选项，但这是一个错误。在解决难题时，候选人是必不可少的。

### Can Sudoku Increase your IQ?

While there is still debate over how effective Sudoku is at increasing your IQ, it is generally agreed among scientists that games such as Sudoku increase several cognitive functions. According to psychologist Peter Gray, playing games can help increase problem-solving abilities and reasonable decision-making.

### What are the 3 main rules for Sudoku?

There are 3 main rules that you must follow in order to play Sudoku. While all of them are fairly similar, you must follow each rule to the tee in order to solve the puzzle.

1. Every single column (vertical) must have every single number, from 1 to 9, with no repetitions.
2. Every single row (horizontal) must have every single number, from 1 to 9, with no repetitions.
3. All 9 large boxes in the puzzle must have every single number, from 1 to 9, with no repetitions.

While there are certainly other small rules to Sudoku, such as no guessing, these are the 3 main rules that you absolutely must follow. To learn more about the rules of Sudoku, go check out our Coolmath Games blog on how to play Sudoku.

### What is the trick to playing Sudoku?

As we previously mentioned, the main ‘trick’ to Sudoku is to scan through the board and search for rows and columns that already have a lot of numbers in them. You can eliminate these numbers from the other unfilled boxes. This should hopefully help you out a lot.

However, harder puzzles may require more than just this. To learn some more in-depth Sudoku strategies, you can check out our blog all about Sudoku Strategy if you are ever feeling puzzled.

### How old is Sudoku?

Most historians agree that Sudoku was created by Howard Garnes, a puzzle constructor from Indiana. It was created in 1979, originally published under the name Number Place.

However, the history goes much deeper than this. It took quite a while for online Sudoku to show up. To learn about all of the fascinating details of online Sudoku, check out our blog all about the history of Sudoku.

## 如何在手机上玩 Sudoku

### 在线数独技巧

#### 填写候选人

“候选人”是一个适合某个位置的数字，即使其他数字也可能适合该位置。解决难题时，尝试用所有可能适合的候选人填补空白。您可以通过单击带有大黑点的按钮来执行此操作，然后将候选人添加到该位置。候选人将显示为很少的数字。许多初学者不会费心使用候选项，但这是一个错误。在解决难题时，候选人是必不可少的。

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