4 Crucial Sudoku Rules That Every Beginner Should Know

The simple and straightforward principles of Sudoku are one of its best features. Solving free Sudoku puzzle games can be a challenge sometimes. To play Sudoku for free, all one needs to do is be able to reason rationally and be familiar with the numbers from 1 to 9. The goal of this game is to complete the grid by using only the numbers from 1 to 9 without repeating any of them. The limitations the player must follow in order to fill the grid bring a lot of difficulties.

You’ve come to the right place if you want to play Sudoku more frequently but are not familiar with the rules. We examine the Sudoku rules that every beginner needs to be aware of in this article. Let’s get going!

Rule 1: Each Row Must Only Include One Instance of Each of the Numbers 1 Through 9.

The player must be very careful to avoid using any duplicate numbers when filling up any of the grid’s rows. The order of the digits doesn’t really matter.

Each free sudoku puzzle game begins with pre-assigned numbers on the grid, regardless of complexity. The player should use these numbers as clues to identify which digits are missing from each row and then insert them.

Rule 2: Each Column Can Only Include One Instance of Each of the Numbers 1 Through 9.

The same Sudoku rules apply to the columns and rows of the grid. The player also needs to fill in these with the numbers 1 through 9, making sure that each digit only appears once in each column.

The numbers assigned at the beginning of the puzzle act as clues for locating and recognizing the missing digits in each column.

Rule 3: The Digits May Only Appear Once in Each Block (nonet)

A typical 9 x 9 grid is made up of nine smaller 3×3 blocks, or nonets. Per nonet, the digits from 1 to 9 can only appear once.

This actually means that when the process of filling the rows and columns without duplicate digits moves forward, another restriction on the arrangement of the numbers is found inside each block.

Rule 4: Each Column, Row, and Nonet Must Sum Up to 45.

To check for duplicates or missing digits in each column, row, or block, the player can simply count the numbers or utilize their prowess in mathematics to add them all up. Each row, column, and group must add up to 45  (1+2+3+4+5+6+7+8+9=45).

Further Information to Put into Consideration

1. Every Puzzle has a Unique Solution.

Any given free Sudoku puzzle game has one solution, which is by correctly applying the Sudoku rules.

Only poorly designed puzzles or, more frequently, those where the player makes a mistake while solving and a duplicate is hidden somewhere else on the grid, are capable of having many solutions.

2. Guessing is Strictly Forbidden.

It is against the Sudoku rules to make an attempt to guess the solution for each cell. These mathematical puzzles need logic, not guesswork

The numbers supplied at the beginning of the game are the only hints needed to solve the grid.

3. Techniques and Notes

According to the Sudoku rules, noting the numbers that are potential candidates for each cell is both permitted and even encouraged. These help the player keep track of their progress and to think clearly and in an organized way.

Additionally, these notes become more crucial as the difficulty level of these puzzles increases so that you can apply the complex puzzle-solving techniques, such the X-Wing method or Swordfish approach, needed to finish the grid.


To sum up, Sudoku is a fantastic puzzle game for a reason. This game is a mind teaser and will leave your mind in terrific shape in addition to being entertaining and addictive to play. Additionally, Sudoku might enhance your ability to concentrate and use logic to solve it. These two crucial abilities will improve your life in many ways, whether at job or in your studies.

As was already mentioned, the best thing about free Sudoku puzzle game is how easy and uncomplicated its rules are. So long as you keep these rules in mind, you can complete your Sudoku puzzle fast and easily. Now that you are aware of the Sudoku rules, you may download it on your smartphone or table and demonstrate your Sudoku solving skills to relatives and peers.