Are there advanced Sudoku techniques?

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

What is a swordfish in sudoku?

The Sudoku Swordfish strategy is a single-candidate technique that uses 3 rows and 3 columns. Since the digit only has 2 or 3 possible positions in those row/columns and the cells are linked, it means the solution for that number will forcibly lie within that chain. The player can then test the different possibilities.

What is HoDoKu?

HoDoKu is a sudoku helper written in Java and available in English and German. Generate sudokus in five different and fully configurable difficulty levels. Manage multiple solutions for one sudoku and write the sudoku plus your solutions to disk.

Is it easy to understand advanced Sudoku strategies?

The theoretical approach of advanced Sudoku strategies is relatively easy to understand and to apply. The biggest difficulty is to find the right patterns on the grid and to know which technique to use in each case.

What is the relationship between the diagonal squares in Sudoku?

There is a relationship between the diagonally opposite squares, hence the “x” in x-wing. The term x-wing itself derives from the x-wing fighters in Star Wars. The Sudoku in Fig. 1 is partially solved using easy and medium difficulty solving techniques: singles, hidden singles and column/block intersections.

Which is better Swordfish or X-wing Sudoku?

Swordfish is a more complicated version of X-Wing. In most cases, the technique might seem like much work for very little pay, but some puzzles can only be solved with it. So if you want to be a sudoku-solving master, read on!

Where did the term X-wing Sudoku come from?

The term x-wing itself derives from the x-wing fighters in Star Wars. The Sudoku in Fig. 1 is partially solved using easy and medium difficulty solving techniques: singles, hidden singles and column/block intersections. Now, no more squares can be solved with these techniques; you are stuck.