How to make a SUDOKU

Who completes a sudoku, sure to try again. Undoubtedly, the great Japanese pastime creates addiction. The fascination with this great pastime emerged in Japan. In this country 600, 000 sudoku notebooks are sold every month. Japan is the land of numerical puzzles par excellence, since Japanese writing is not suitable for crossword puzzles. However it was not discovered in Japan, since it was the brilliant Swiss mathematician Leonhard Euler, who lived in the eighteenth century.

one

In Japanese "su" means "number and" doku ·, "solo". Translated, the name means something like "the numbers must be alone".

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The board of this hobby consists of a grid formed by nine sub-grids arranged in the form of 3x3 called "boxes", "regions" or "blocks".

3

The objective of the game is to fill in all the boxes of each box with the numbers from 1 to 9. The digits from 1 to 9 must appear: -in all the rows- in all the columns- in all the boxes only once.

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The sudoku is structured in such a way that there is only one correct solution. If a number is placed in the wrong place, the puzzle can no longer be finished successfully.

5

Generally, the more predetermined numbers in the boxes, the easier it is to solve the sudoku, although this does not detract from the fun of the game. The level of difficulty of each sudoku is determined above all by its logical structure.

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The rules of sudoku are quite easy, and solving these entertaining hobbies can be very fun. In addition this game will keep the player's mind in shape.

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There are several methods to solve them, the simplest is to scrutinize with the eyes the rows, columns and boxes to find out what is the number between 1 and 9 that is missing.

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In this way it is checked, for example, which numbers are excluded for an empty cell of a given row taking into account those that appear in the same column or in the box where the box is located.

9

It is an elimination procedure by means of which the numbers from 1 to 9 of each of the rows, columns and boxes are systematically reviewed to answer a question. What number is discarded? Or, what is the number that stays ?.

10

When starting the game it is always easier to place some of the numbers. The difficulty increases when, once the elimination procedure has been carried out, several numbers fit in the same box. In these cases it is helpful to write the very small numbers in pencil in the box in question or write them down and move on. As the game progresses, it is convenient to cross out or delete the numbers that are discarded.

eleven

To solve the sudoku, you should always review the nine figures from the beginning and systematically verify all the possibilities. Although there are several options per box, the digits are eliminated one after the other, it is only a matter of trying it.

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The smartest players will quickly realize that, on occasion, two numbers can be interchangeable in a row, column or box. Although it is not clear in what position should be written in the beginning, in the end one or the other option for elimination is discarded.

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A sudoku is not solved by fixed procedures or clearly defined methods, but to complete them, various techniques must be combined, which undoubtedly brings fun to the game. Very soon each player discovers his own way to achieve the goal. Solve each sudoku that falls into your hands.