Play Now: Free Online Sudoku
Free online Sudoku is ready to challenge you anytime, anywhere. No downloads needed – just open the page and dive into the 9×9 grid. Fill it with numbers 1-9, ensuring each row, column, and 3×3 box contains all digits without repetition.
How to Play Sudoku
The goal of Sudoku is to fill a 9×9 grid with numbers 1-9. Every row, column, and 3×3 section (small box) must have all numbers from 1-9—no repeats.
At the start, some squares in the 9×9 grid are already filled with numbers. These are your clues. You just need to use logic to fill in the empty squares and finish the grid.
A move is wrong if:
• Any row has the same number (1-9) more than once
• Any column has the same number (1-9) more than once
• Any 3×3 section has the same number (1-9) more than once
Choose from six difficulty levels, from Beginner to Master. Whether you're new to Sudoku or a seasoned solver, each puzzle offers the perfect mental workout. Just 10 minutes a day can sharpen your focus and logical thinking while providing relaxing entertainment.
History and Development of Sudoku
The embryonic form of Sudoku can be traced back to the "Latin Square" designed by the Swiss mathematician Leonhard Euler in the late 18th century. Its logical rule of "no repeated symbols in rows and columns" is the ideological origin of Sudoku.
In the 1970s, the American magazine Dell Pencil Puzzles and Word Games launched the "Number Place" game. It fixed the 9×9 grid, divided it into 3×3 subgrids, and clarified the rules of filling numbers 1-9 without repetition, thus laying the framework for modern Sudoku.
In 1984, the Japanese magazine Nikoli improved the game and named it "Sudoku" (meaning "single number"), making it quickly popular in Japan. In 1997, Wayne Gould, a New Zealander, introduced it to the UK. After being promoted by The Times, it became popular worldwide.
Today, Sudoku remains popular in many parts of the world. In European and American countries, such as the UK, the US, and Germany, newspapers often publish Sudoku puzzles, and there are numerous users of online Sudoku games. In Asian regions like Japan, China, and South Korea, Sudoku is not only a daily puzzle choice for the public but also sees various folk or professional competitions held. In countries and regions such as Australia and Singapore, Sudoku, with its easy-to-learn nature, has become a favorite leisure activity among people of all ages.