How to solve Sudoku ?
Games / / August 12, 2017
- puzzle Sudoku
- free time
numeric structure was invented in Switzerland in the XVIII century, on its basis in the XX century has been developed a numerical crossword.However, in the US, where it was invented by the game itself, it did not receive wide distribution, in contrast to Japan, where the puzzle is not only caught on, but also gained a lot of popularity.It was in Japan, she has acquired habitual name "Sudoku", and then spread around the world.
Crossword has a simple structure: given a matrix of 9 squares, called sectors.These squares are arranged in three in a row and have a 3x3 size.Sudoku Matrix looks like a square, consisting of 3 rows and 3 columns that divide it into nine sectors, each containing 9 cells.Some of the cells filled with numbers - the more numbers you know, the easier the puzzle.
necessary to fill all of the empty cells,
Consider a simple version of Sudoku.For example, in the sector or line remained only 1 empty cell - it is logical that it is necessary to enter the number that is not in the number series.
Next is to explore the rows and columns in which there are equal numbers in the two sectors.Since the numbers should not be repeated, it is possible to check which cells can be placed in the same figure 3 sector.Often, there is only one cell in which just need to enter the number.
Thus, the portion of the field is full crossword.Then you can begin to learn the lines.For example, in the line there are 3 free cells, you understand what figures to be written to, but do not know where exactly.We must try to substitute.Often there are options when other cells 2 in the figure can not be located, or because it is in the corresponding column, or in the sector.
In difficult sudoku these methods work only half, there comes a time when it is absolutely impossible to determine in which cell enter the number.Then you need to make a guess and check.If the row, column, or cell sector has 2, in which it is equally possible to enter a number, then you need to write it in pencil and follow the logic of filling on.If your assumption is wrong, then at some point the crossword will mistake and there digits repeat.Then it becomes obvious that the figure should be in the second cell, you need to go back and correct the error.Better in this case to use a crayon to make it easier to find the point at which you need to solve a crossword puzzle again.
easier and faster to solve Sudoku, if the original outline with a pencil, what numbers can be in every cell.Then you do not have to check every time, all sectors, and in the process of filling will be immediately apparent to those cells in which there is only one version of the allowable numbers.
Sudoku - is not only an exciting game, which allows you to pass the time, it's a puzzle game that develops logical thinking, the ability to hold large amounts of information and attention to detail.