Before we cover how to solve Sudoku puzzles, let’s take a moment to review a few aspects of Sudoku including the rules, terminology, and game variations.
What is Sudoku?
A Sudoku puzzle is defined as a logic-based, number-placement puzzle. The objective is to fill a 9×9 grid with digits in such a way that each column, each row, and each of the nine 3×3 grids that make up the larger 9×9 grid contains all of the digits from 1 to 9. Each Sudoku puzzle begins with some cells filled in. The player uses these seed numbers as a launching point toward finding the unique solution.
It is important to stress the fact that no number from 1 to 9 can be repeated in any row or column (although, the can be repeated along the diagonals).
The Rules of Sudoku:
While solving Sudoku puzzles can be significant challenge, the rules for traditional solution finding are quite straight forward:
• Each row, column, and nonet can contain each number (typically 1 to 9) exactly once.
• The sum of all numbers in any nonet, row, or column must match the small number printed in its corner. For traditional Sudoku puzzles featuring the numbers 1 to 9, this sum is equal to 45.
Here are some sudoku tips and tricks that will help you playing and wining sudoku.
• Naked Singles: A Naked Single is the easiest Sudoku trick to learn and apply. It involves a situation where a cell has only one candidate and therefore must be that number. The logic here is entirely straightforward. If a cell has only one candidate, that candidate must go in that cell.
• Hidden Singles: A Hidden Single is only slightly more difficult to spot than a Naked Single. Again, the logic is pretty straightforward. It doesn’t matter which candidate are in a cell. If that cell has a candidate that only appears one time in the nonet, it must be committed to said cell.
• Naked Pairs: A Naked Pair isn’t as conclusive as a Naked Single, but it is extremely helpful nonetheless. With a Naked Pair, we can conclude that anywhere else in the row / column containing the pair, the numbers making up the pair can be eliminated.
• Hidden Pairs: A Hidden Pair is trickier to find, but the logic is still the same. The numbers making up the pair can be eliminated from the row, column, or nonet in which the cells containing the pair reside.