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Mar 4, 2017 · 2M views 7 years ago. Master these strategies and be an expert. Please visit my channel and check out my other uploads such as "How to solve a Sudoku puzzle - A Tutorial", or "Next Nine...
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The basic rule is that each digit can appear only once in each row, column, and small square. Complete all the numbers to win sudoku. Pros of solving expert puzzles online. Sudoku.com has some features that will help you with expert level Sudoku. An option that is especially useful at the beginning of the game is the ability to select a hint.
- The X-Wing
- The Swordfish
- Forcing Chains
- The Xy-Wing
- Unique Rectangle Type 1
- Nishio
The X-Wing methodis one of the most basic advanced Sudoku strategies. It can also be applied in some intermediate levels, although its incidence is very low in these cases. Its goal is to eliminate candidates. The player can use this strategy when there is one candidate repeated in four cells that form a square or rectangle when mentally connected ...
This strategy helps to eliminate a candidate from cells too. To apply it, the player must find a digit candidate to two cells in the same row, in three different rows. These cells must also be united by column, regardless of the shape they create. Connecting them will result in a closed chain that reveals two sets of possible placements for that di...
Forcing chains is one of the easiest advanced Sudoku strategies to understand. Unfortunately, applying it requires very high levels of concentration and the outcome can be uncertain. When it does work, it gives the player the solution for one cell. To apply a simple forcing chain, there must be cells with only two candidates in the grid. The player...
The XY-Wing is a strategy to remove candidates. It can be applied when there are three cells in the grid, each with only a pair of candidates that share at least one digit among them (e.g. AB/AC/CB). With a bit of mental effort, the player can picture a Y when connecting them, with one cell working as the stem and the remaining as the branches. The...
Any Sudoku puzzle must have only one possible solution. However, at the most extreme levels, the players might find themselves with two. This happens when there is a “deadly pattern”. This pattern happens when there 4 cells with the same pair of candidates facing each other. For it to be “deadly” each set of two cells must also be placed within the...
The Nishio strategy takes its name from professional puzzle player Tetsuya Nishio who is credited with inventing it. Out of all the advanced Sudoku strategies, this is the one that players avoid the most and use only as a last resource as it takes guessing as a premise. Basically, the player must take a cell with two candidates, choose one, and try...
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- Use a pencil. This may seem obvious to you, but some folks don’t do this! It’s possible for adept players to solve easier sudokus with pen, but for harder puzzles it’s going to help a lot if you use pencil.
- Note potential candidates in open squares. Taking notes is mandatory if you’re solving complex puzzles. Write potential candidates down lightly in open boxes.
- Scan the board to process the puzzle. Take a minute to look over the board and take it all in. You’re probably not on a timer here, so don’t rush anything.
- Start with the obvious singles. Naked and hidden singles are the easiest squares to solve. A naked single is when a number can only go in one possible cell.
Sudoku Rule № 1: Use Numbers 1-9. Sudoku is played on a grid of 9 x 9 spaces. Within the rows and columns are 9 “squares” (made up of 3 x 3 spaces). Each row, column and square (9 spaces each) needs to be filled out with the numbers 1-9, without repeating any numbers within the row, column or square. Does it sound complicated?
Yes, you can definitely play expert level sudoku for free! There are many websites and platforms that offer expert level sudoku puzzles for free, including Sudoku Academy. Playing expert level sudoku for free is a great way to challenge yourself and improve your problem-solving skills in a fun and enjoyable way.
Play expert sudoku online. Ready for the next level? Explore our collection of expert sudoku puzzles and sharpen your sudoku solving skills. Hints available!
