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Let's Play Sudoku

How to play Sudoku?

The classic Sudoku game comprises of a grid of 81 squares. The grid is distributed into nine blocks, each containing nine squares.

sudoku game

The rules of the game are simple: each of the nine blocks has to hold all the numbers 1-9 within its squares. Each number can only arise once in a row, column, or box.

The difficulty lies in that each vertical nine-square column, or horizontal nine-square line across, within the larger square, must also hold the numbers 1-9, without repetition or omission.

Every puzzle has just one correct solution.

Best tip to solve Sudoku

There are more than a few techniques to solve a Sudoku puzzle, but the easiest way to a Sudoku solution is to, "Scan rows and columns within each triple-box area, eliminating numbers or squares and finding conditions where only a single number can fit into a single square." If you're looking to learn how to play Sudoku, the scanning technique is a swift and usually an efficient way of solving easy Sudoku puzzles from start to finish and can get players far into more difficult puzzles before shifting to an advanced sudoku strategy.

What is pencil marking in Sudoku?

Sudoku pencil marking is a systematic Sudoku solver approach in which puzzle doers use a pencil to write small numbers inside the squares, indicating which numbers may fit in. After pencil marking the puzzle, the solver must analyse the results, identify special number combinations, and deduce which numbers should be placed where. Pencil is, of course, easy to delete in a hurry once you find the solution—or realize you made a error. Your pencil won't help you find the missing number in this puzzle.

What are Naked Single Candidates?

Every Sudoku puzzle will have cells that have only one feasible candidate. If there aren't any additional candidates showing, Sudoku players call this as a naked single.

Every naked single permits us to safely exclude that number from all other cells in the row, column, and region that the naked single lies in. The logic is simple. If there is one cell that contains a single candidate, then that candidate is the solution for that cell.

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