Sudoku rules

About Retro Sudoku online

Sudoku is a logic-based number puzzle game that has gained immense popularity around the world. The objective of the game is to fill a 9x9 grid with digits so that each column, row, and 3x3 sub-grid contains all the numbers from 1 to 9 without repetition.

History of the Sudoku game

The game of Sudoku originated in Switzerland in the late 18th century under the name "Number Place," but it was later popularized in Japan in the 1980s, where it was given the name Sudoku, which means "single number" in Japanese. The game has since become a global phenomenon, with millions of people playing it every day.

Who can play Sudoku online?

Sudoku is a game that can be enjoyed by people of all ages and skill levels. Our online Sudoku game is free for anyone to play, no login or sign-up required. The game typically comes in different levels of difficulty ranging from easy to hard. Easy Sudoku puzzles have more numbers filled in at the start, making it easier to solve, while hard puzzles may have fewer numbers filled in, requiring more advanced logical skills to complete.

Some handy Sudoku tips

To play Sudoku, start by looking for numbers that have already been filled in the grid. Use these numbers to help determine which numbers can be placed in the remaining empty squares. Pay attention to the rules of the game, making sure that each column, row, and sub-grid contains all the numbers from 1 to 9 without repetition. When starting a new puzzle, it's important to look for patterns in the grid that can help you solve the puzzle faster. For example, if there are already two 7s in a row, you know that the remaining square in that row cannot be a 7. Another strategy is to use the process of elimination. If you know that a certain number cannot be placed in a specific square, eliminate it from the possible options for the remaining squares in that row, column, or sub-grid.

Enjoy playing Sudoku online

Sudoku is a game that can be enjoyed anywhere, at any time, and it's a great way to exercise your brain and improve your logical reasoning skills. With a little practice and patience, anyone can become a Sudoku master.

Come back anytime to exercise that grey matter!