Sudoku (数独) is a popular logic puzzle game with numbers. This is a great exercise for the brain, developing the speed of thinking and logic, the ability to quickly focus and patiently bring what has been started to the end.
The name consists of the Japanese characters Sū (number) and Doku (one, single). Sūdoku can be translated as "numbers with a single location". The game was not born in Japan, it appeared in Switzerland, and then went to the land of the rising sun via America.
The Swiss mathematician Leonhard Euler invented the game Carré latin in the XVIII century. Based on this game, American architect Howard Garns created the number Place puzzle. The game was published in Dell Puzzle Magazine in 1979.
The puzzle became really popular after the Nikoli publishing house published Sūji wa dokushin ni kagiru (the number must be the only one) in the Japanese newspaper Monthly Nikolist in 1984. The company's President Maki Kaji shortened the name to a short Sūdoku, taking parts of the two words Sū and Doku. The game fascinated the Japanese very much, returned to the United States a few years later, and from there penetrated to Europe and Australia.
Now the game has spread around the world. It is published in many publications, developing electronic versions for PC and mobile devices, creating game clubs, organizing competitions and even world Championships.
- Bertram Felgenhauer has counted the number of possible combinations of Sudoku on a standard 9x9 field, and came to the conclusion that there are 6 670 903 752 021 072 936 960.
- The first world Sudoku championship was held in Lucca (Italy) in 2006. Jana Tylova from the Czech Republic won.
- The most complex Sudoku in the world was created by the Finnish mathematician, Professor of the University of Helsinki Arto Inkala in 2010.
- In Japan, the Sudoku solution is included in the Wellness program for the elderly.
- A trial that lasted more than two months broke down in Sydney over Sudoku. During the hearing, several jurors were engaged in solving a puzzle and did not follow the process. The chief juror of the panel was forced to confirm this fact.
If you were looking for a place where you can play Sudoku for free and as much as you want, congratulations on your arrival at the address!
Sudoku is a logical online game that does not require special mathematical skills. All you need is the ability to focus and think.
At the start, some of the cells are already filled. Your goal is to enter the missing numbers in the empty cells.
The playing field is a 9×9 square divided into smaller squares with a side of three squares. Some cells already contain numbers from 1 to 9-these are hints.
The goal of the game is to fill in the empty cells with numbers so that each row, each column, and each small 3×3 square has only one digit.
The difficulty of Sudoku depends on the number of hint cells. Simple and complex games require a different approach, solving the puzzle takes from a few minutes to many hours. A correctly composed Sudoku problem has only one correct solution.
Tips on the game
There are different approaches to completing Sudoku. You can choose one of the proven methods or invent your own.
- Process of elimination. Try to identify the cells where you can enter only one version of the number. First, find the small squares that already contain five or more digits, and fill in the remaining cells. After that, take care of rows or columns with a minimum of empty cells. After checking the cell for cross-columns and lines, enter the only possible option.
- Selection of options. If there are no unambiguous solutions, enter several possible candidate numbers in the cells. In the course of the decision, you will exclude unnecessary candidates. This will gradually fill all the available space.
The use of strategies reduces the probability of error and brings victory closer. Now you know more about Sudoku than you did five minutes ago. Turn on your intellectual abilities, focus and start playing a free online game.