Sudoku Tips

Cages and their sums are the defining features of Killer Sudoku. They are what make this variant of the classic number puzzle unique and a central part of the challenge and the solution of each grid. Cage combinations are thus nothing more than a step to solve these puzzles and …

The 45-rule is one of the most basic Sudoku strategies but its usefulness and importance in solving Killer Sudoku puzzles cannot be overstated. While in classic puzzles it is merely a matter of common sense and a natural consequence of the rules, in the Killer variant it becomes essential to …

Numbers puzzles are an excellent pastime for players of all ages. They are fun, challenging, and keep the brain sharp by requiring the use of logical and/or numerical reasoning to find their solution. Teachers and parents often use them as a fun educational asset to help kids develop their mental …

The Unique Rectangle set of strategies comprises useful techniques that are relevant throughout all the difficulty levels of Sudoku. In easier puzzles, these strategies have a high chance of revealing the solution for one or more cells, while in harder levels they can either provide a solution or help to …

Lacking an internet connection is not an excuse for players not to enjoy solving Sudoku puzzles or miss the opportunity to learn new strategies that will take them a step closer to mastering the hardest grids. Selecting and enjoying some of the best sudoku books out there can prove to be …

The Sudoku X-Wing strategy is one of the most frequent techniques that can be applied to Sudoku puzzles from a medium difficulty level onwards. It is a very straightforward technique with an easily identifiable pattern. It focuses on one single digit and its goal is to restrict the number of …

The Sudoku Swordfish strategy is a basic advanced technique applied in the hardest levels of these puzzles to eliminate candidates. It is considered basic due to the clarity of the fish pattern required for its application and its recurrence.
 
The use of this strategy usually results in the unveiling …

It might seem strange that such a thing as common Sudoku mistakes can exist, and yet they do. Despite their clear and straightforward rules, these puzzles have their own pitfalls to always ensure a good challenge. Experienced players get to know all the tricks by heart, but beginners might stumble …

Advanced Sudoku strategies are used in the hardest levels of these puzzles and they can either help to reduce candidates or find the solution for a specific cell. Regardless, their application always demands high levels of concentration from the player as they work by deduction.

1. The X-Wing

The X-Wing …

Sudoku can look deceptively easy to solve due to its simple and straightforward rules. Nevertheless, these puzzles are designed to always be challenging, regardless of the level. New players are thus bound to encounter difficulties filling the grid and should expect to do so. Fortunately, there are some Sudoku strategies …