The puzzle promotes the development of logic, which in turn helps to improve memory. This contributes to the development of logical thinking person. When playing the game, a person does not perform any mathematical operations, but they have to, by reasoning logically, put numbers in the right cells, following the existing rules. When you start playing medium Sudoku, you get a number of benefits for yourself: Finding them in sectors usually takes a considerable amount of time. They are called this way because they are very difficult to detect on the playing field. Thus, these two empty cells can be filled only with the first or second pair of digits. Hidden pairs are two identical pairs of digits located in opposite corner cells of the 3x3 sector, which cannot be found in other cells. Thus, it can be concluded that these candidates can be excluded from other cells of the analyzed row or column. The correct location of each of the digits is not known exactly, but the player knows the exact position of these digits in the cell. Naked pairs are two identical pairs of digits that are simultaneously in the same row and column and are candidates for this location. The following are paired methods that allow the user to exclude only candidates. It is called "hidden" because other candidates create "noise" (interference, distraction) that makes it difficult to detect. In this case, you may have several candidates for a cell, but only one digit is the solution in that row, column, or sector. Hidden singles follow the same logic, but in the opposite direction. Consequently, the number in question, regardless of the fact that it may be a candidate in other cells of any row, column, or sector, is a solution for that cell. If the player finds a cell with a digit that is the only candidate for that place, such a digit is called a naked single. All of these methods require the user to write down each candidate they want to apply to each cell. They are called naked single, hidden single, naked pairs, and hidden pairs. There are four basic methods of achieving this goal. They can be used either to find a solution for a particular cell or to eliminate candidates and remove unnecessary notes from the cell.
To solve medium difficulty Sudoku, it is necessary to use the "pencil" notes function. You can read more about the interface by following this link. This is where notes and strategic decisions come into play. However, at the middle level, at the very beginning of the game, the field contains fewer filled cells, which makes it difficult to find the correct position of the missing ones. The goal of the medium Sudoku is to fill in the empty cells with missing digits, observing one basic rule – there must be no repetition of the same digit in row, column and sector.
Also the visual field is divided into sectors (groups), the size of which is 3 by 3 cells. Having familiarized with the principles, understanding the logic of the game interface and consolidating the results and speed of finding a solution on the first level, any user can go to the medium level online Sudoku, starting to improve their mathematical skills, logical reasoning and inference.Īt the very beginning of the game, there is a 9x9 cell field consisting of nine rows (1x9) and nine columns (9x1) on the screen in front of each player. At the initial stage, each player gets acquainted with the rules and principles of the game and the available strategies, gets the first experience of achieving a winning result, regardless of the time it takes them to achieve it – quickly or significantly longer.
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