International Sudoku Day

A number puzzle in the form of a square with a playing field of 81 cells was invented in the 18th century Leonhard Euler This Prussian, Swiss and Russian mathematician and mechanic was engaged not only in number theory and mathematical analysis Euler studied algorithms for constructing "magic squares", in which the sum of the numbers in each column, row and diagonal is the same Thus, thanks to scientific research, the game Sudoku appeared The puzzle is based on a 9th order Latin square It is believed that the birthplace of the classic game is Japan The name of the puzzle comes from the abbreviation of the expression Sūji wa dokushin ni kagiru (translated from Japanese as “Numbers are limited to one location”) Today, more than 600 thousand Sudoku magazines are sold every year in the Land of the Rising Sun The goal of the logic game is to fill a board of 81 squares with numbers from 1 to 9 so that in each column, row and small square the number occurs only once According to another version, Sudoku owes its origin to the architect Howard Garnes from the USA He drew a puzzle, which was used for entertainment and mental training, on a drawing board The Indiana architect's Sudoku was first published in May 1979 in Dell Magazines Initially, the puzzle was called Number Place, later receiving the name "Sudoku" A holiday has been established in honor of the game, which has surpassed the Rubik's Cube in popularity Every year on September 9th International Sudoku Day is celebrated Today the puzzle is available not only in printed form There are applications for playing Sudoku on smartphones A world championship is being held in her honor Its winners in the individual competition three times were the American Thomas Snyder and the Pole Jan Mrozowski The possibilities for playing and practicing number combinations are endless Scientists from the USA Frazer Jarvis and Bertram Felgenheuer calculated the number of combinations of numbers for the magic square, as L Euler called it, 9th order Their number was 6,670,903,752,021,072,936,960 options Puzzles are a popular leisure activity that trains the brain and mental acuity Sudoku enhances concentration, therefore it is recommended for older people as a prevention of senile dementia - Alzheimer's disease and other types of dementia In honor of International Sudoku Day, special collections of puzzles are published, and 9th order Latin squares are published in newspapers and magazines Some Sudoku puzzles can be solved in 5 minutes, while others require several hours Quickly filling out the entire number grid is available to fans of the game who are distinguished by perseverance, good memory and logical thinking