Sudoku Online

Sudoku Online is a handy way to test your Sudoku skills. Whether you're a Sudoku guru or you're playing Sudoku for the first time in your life, the rules are simple. At the beginning of the game, you will have a grid divided into nine squares of 3x3 cells each. Some cells are already filled with numbers. Your task is to fill the entire grid with numbers from 1 to 9 so that the same numbers do not occur in one line, row or square. Play Sudoku and have good luck!

How to play Sudoku Online?

At the beginning of the game, you will have a grid divided into nine squares of 3x3 cells each. Some cells are filled with numbers from 1 to 9. Your task is to fill in the remaining empty cells.

Start playing by clicking on any empty cell you want to fill. The line and row where the cell is located will be highlighted. Your task is to choose a number from 1 to 9 so that it does not appear twice in the same line, row or square.

Click a number from 1 to 9 below the grid to write it to the selected cell. Identical numbers will be highlighted throughout the grid, so you can check if there are any identical numbers in the same line, row or square.

The number you wrote down will be colored blue, you can always go back to it and change your mind.

There is a stopwatch below the grid, so you can see how much time you are spending on the game.

Click the Erase button to delete the selected number.

Click the Hint button to get help if you get stuck.

Did you like Sudoku Online?

Sudoku is a great way to pass the time and practice your logic skills. Sudoku originated in the 18th century, when the famous mathematician Leonardo Euler created a game called Carré latin. In the 1970s, number puzzles based on Carré latin began to appear. For example, Sudoku reached the United States in 1979, where it first appeared in Dell Puzzle Magazine. Sudoku puzzles have four basic rules. The same numbers should not occur, firstly, in the same line, secondly, in the same row and, thirdly, in the same 3x3 square. The fourth rule is: the sum of the numbers in each row, line or 3x3 square must be equal to 45. Sudoku is not a puzzle for guessing numbers, here you need to count and analyze the arrangement of numbers. Invite your friends to play Sudoku together or compete against the clock!