Is there a strategy to solving Sudoku?

The most basic strategy to solve a Sudoku puzzle is to first write down, in each empty cell, all possible entries that will not contradict the One Rule with respect to the given cells. One more complicated strategy is to look at pairs or triples of cells within a row, column, or block.

What are the techniques in Sudoku?

Sudoku techniques

• Scanning in one direction:
• Scanning in two directions:
• Searching for Single Candidates:
• Eliminating numbers from rows, columns and boxes:
• Searching for missing numbers in rows and columns:
• Eliminating squares using Naked Pairs in a box:
• Eliminating squares using Naked Pairs in rows and columns:

How long does it take to solve hard Sudoku?

It can be incredibly challenging to solve a Sudoku puzzle. That’s what makes it fun. It is believed that the average Sudoku player spends approximately 20 minutes solving a typical Sudoku puzzle. For very hard puzzles, that number can be much higher.

Is there a pattern for Sudoku?

The essence of the standard sudoku pattern is threefold: (a) a 9-by-9 grid of squares is divided into nine square sub-grids; (b) a set of nine distinct symbols is used, be they digits, letters, colors or shapes; (c) each row, each column and each sub-grid must contain each of the symbols exactly once.

What are the techniques for solving Sudoku?

Techniques For Solving Sudoku 1 Medium Techniques. Going a little further, there are some extra techniques which help you to find either valid placements, or to help you to remove some of the pencilmarks. 2 Advanced Techniques. 3 Master Techniques. 4 Harder Still

What is a unique candidate in a Sudoku board?

You know that each block, row and column on a Sudoku board must contain every number between 1 and 9. Therefore, if a number, say 4, can only be put in a single cell within a block/column/row, then that number is guaranteed to fit there. This example illustrates the number 4 as the unique candidate for the cell marked in red.

Is the Sudoku assistant the same as the Swordfish?

If you look at the JavaScript code for the Sudoku Assistant, you will see that it uses the same function (analyzeX, just 16 lines) to find all possible X-Wings, Swordfish, hidden sets, and “naked” sets. The fact is, all of these are the same “beast” just seen from different perspectives. (More on that later!)