|
|
Sudoku
|
Sudoku Tutorial
|
|
Sudoku is one of the most popular number puzzles. According to recent research published in the International Journal of Geriatric Psychiatry, solving Sudoku or other number puzzles may help to improve your attention, memory, and reasoning, and may even keep your brain ten years younger.
Our tutorial provides in-depth analysis of the most useful Sudoku solving techniques that will help you to improve your solving skills. The Sudoku Solver is one of the most important parts of our tutorial. The Sudoku Solver provides step-by-step detailed solutions for almost any Sudoku puzzle. Using the Sudoku Solver can help you approach the most challenging obstacles you may find while working on your puzzles.
Below is a list of topics covered in our Sudoku Tutorial:
|
Introduction to Sudoku
|
 Sudoku Rules: Sudoku rules are simple: each 3x3 block, each row, and each column has to contain all the numbers from 1 to 9 and each number should only appear once in each box, row, and column. Read More
|
 Sudoku History: According to Chinese legend, the first Magic Square was discovered by the Emperor Yu the Great (c. 2123 – 2025 BC) when a magical turtle emerged from the water with the curiously unnatural Lo Shu pattern on its shell: Read More
|
|
Sudoku Algorithms
|
 Naked Single: According to Sudoku rules, the number in a cell can appear only once in each block, each row, and each column. For each cell we can create a list of possible candidates that can appear in a cell. Read More
|
 Conflicting Candidates: A list of hints in any cell represents the variety of possible candidates for this cell. If one of the possible candidates in the cell (a hint) has the same value as any cell in the same box, row, or column, Read More
|
 Naked Pairs: Naked Pairs are the two cells in the same block, row, or column which have exactly the same pair of two candidates and there are no other candidates in these two cells. Read More
|
 Hidden Singles: According to Sudoku rules, each number should appear at list once in each box, row, and column. Hidden Single is a number that appears as a possible candidate Read More
|
 Hidden Pairs: Hidden Pairs are similar to the Naked Pairs. They are two cells in the same block, row, or column which have exactly the same pair of two candidates. Read More
|
 Box/Line Reduction: The Box/Line Reduction technique is similar to the Hidden Single. In the Hidden Single technique, we are looking for a number that appears as a possible Read More
|
 Naked Triples and Quads: Naked Triples are very similar to Naked Pairs. As the name indicates, there is a list of three candidates, and are three cells in the same block, row, or column, which have no other candidates in these three cells except those from the list. Unlike Naked Pairs, it is not required for Naked Triples that all three sells have all tree candidates, but each of selected candidates should be presented in at least one of these cells. Read More
|
 Pointing Pairs: The Pointing Pairs technique helps to remove conflicting candidates in the same row or column. If a number appears as a possible candidate only in one row or column in a box, this number should not appear in the specified row or column in any other box. Read More
|
 X Wing: The X-wing is an advanced Sudoku technique that uses single hints in two parallel rows or two parallel columns, forming an X pattern. Read More
|
 Swordfish: The Swordfish sudoku pattern is an extension of the X-Wing pattern. The Swordfish sudoku pattern is formed by the same hint appearing in nine cells at the crossing of three rows and three columns. Read More
|
 Y Wing: The Y-Wing Sudoku pattern is reminiscent of the X-Wing pattern, as it also consists of four interrelated cells. Unlike the X-Wing pattern, the four cells in a Y-Wing pattern do not necessarily form a rectangle. Read More
|
 XYZ Wing: The XYZ-Wing is an advanced Sudoku-solving technique, extending the Y-Wing technique. It involves three cells that contain only three possible values. Read More
|
 Bivalue Universal Grave (BUG): The Bivalue Universal Grave is a Sudoku-solving technique based on the assumption that a Sudoku puzzle, where all remaining cells contain just two candidates, does not have a unique solution. Read More
|
 Unique Rectangles: The Unique Rectangles technique assumes that a Sudoku puzzle has only one solution. Any configuration that could lead to multiple solutions is considered invalid. Read More
|
 Singles Chains: The Singles Chains sudoku-solving strategy is an advanced and powerful technique. Sometimes this technique is also called Single Coloring. It goes through the chain of single interrelated candidates in different cells and color mutually exclusive candidates in two different colors. Read More
|
 Rectangle Elimination: The Rectangle Elimination Sudoku solving pattern allows to eliminate a single candidate and involves cells in two rows and two columns. Read More
|
 3D Medusa: The 3D Medusa Sudoku solving strategy is an extension of the Singles Chains strategy. Singles Chains link candidates that appear twice in the same column, row, or square. 3D Medusa extends this strategy by linking two candidates that appear in the same cell. Read More
|
 Chains: Chains are the most complicated Sudoku solving techniques. This strategy is used when no other technique allows solving the Sudoku. A Chain is a sequence of related candidates. Making an assumption on one candidate might affect other candidates in a Chain. Read More
|
|
Sudoku Solver
|
 How to Use Sudoku Solver: PuzzleMystery.com presents a Sudoku Solver to help Sudoku players to improve their solving skills. On each click on the “Next Step” button, the help message board (area C) presents the detailed explanation of the next step. On the Sudoku grid (area A) the hints related to the next step are marked by different colors according to the solving logic. Read More
To open the Sudoku Solver, please follow the link: Sudoku Solver.
|
|
|
|
|
|