How to play online Sudoku, the famous game that takes the form of a mathematical crossword? Let's find out together, also delving into its history.

Sudoku is a mathematical game that began to have international limelight around 2005. How to play Sudoku? Let's find out together. But first let's understand exactly what Sudoku is and what its history is.

It is an intelligent pastime, a game that trains and fascinates mathematical minds. Sudoku can be played online or by printing it, there are different levels of difficulty and there are numerous variations. The rules? It is simply a matter of filling a grid that has some boxes with a number already assigned from 1 to 9. Let's see specifically how to play Sudoku.

Sudoku: the story

Free online Sudoku is a logic game invented by the Swiss mathematician Euler from Basel and has made several laps before reaching us: the modern version of the game was first published in Dell Magazines by an American architect in 1979, later popularized in Japan by the Nikoli publishing house in 1984 and rose to international prominence only in 2005.

The first logic games based on numbers began to appear in newspapers towards the end of the 19th century thanks to the experimentation of some French riddlers. The first to publish a partially complete 9x9 magic square with 3x3 sub-squares was a Parisian newspaper, Le Siècle, in 1892. It was not a Sudoku puzzle as we know it now as it contained double-digit numbers and, more than logic, to be solved it required arithmetic. The thing in common with sudoku as we know it today was that the rule was foreseen that each of the rows, columns and sub-squares that made up the scheme contained the same numbers without repeating them.

The rules of the game proposed by Le Siècle were redefined by its competitor, La France, who established that only the numbers from 1 to 9 could be used in the game.

These games were also published in other French newspapers until they disappeared when the First World War broke out.

According to the American riddle Will Shortz, the sudoku puzzle as we know it is the work of Howard Garns, a former architect who in 1979 published it for the first time in Dell Pencil Puzzles and Word Games magazine, calling it Number Place.

In Japan, however, the game was introduced by the Nikoli publishing house in Monthly Nikolist magazine in 1984 calling it Suuji wa dokushin ni kagiru.

In 2004 it was a former New Zealand judge who brought sudoku to Great Britain, from which it then spread to Europe and the rest of the world.

How to play Sudoku?

Web Sudoku, for some years now, has become a very widespread game, with great enthusiasts and mon