How to Play

Sudoku

Sudoku is a logic-based, combinatorial number-placement puzzle game.

Game Layout

The Sudoku game board is a 9 x 9 grid of squares. A new game starts with a partially completed game board.

Objective

The object of the game is to fill in the remaining squares using the rules below to guide you. The game is finished when all squares have the correct number in them.

Rules

To solve the puzzle, every square in the grid has to contain a single number between 1 and 9 while adhering to the following three rules:

Every vertical column of 9 squares must contain each of the numbers from 1 to 9 once and only once

Every horizontal row of 9 squares must contain each of the numbers from 1 to 9 once and only once

Each of the 9 – 3 x 3 boxes must contain each of the numbers from 1 to 9 once and only once

To fill a square with a number, tap on the square to select it; you will see it is highlighted. Then tap on your number of choice from the row of Number Selection Buttons located below the game board.

Variations

Color Sudoku and Sudoku Scrapbook are variations to the number game where the numbers are replaced by colors or pictures. The rules and strategies are the same.