Sudoku is one of the world's most widely played puzzle games. The goal of classic Sudoku is to fill a 9x9 grid with digits so that each column, row, and each of the grid's nine 3x3 subgrids contain all of the digits from 1 to 9.

Challenge yourself and your friends and play this Sudoku game for Android to see how many puzzles you can solve in a limited period of time. Check your global rank in the leaderboard based on how many puzzles you've solved, and challenge yourself using the game's Achievements.

There are three difficulty levels: easy, medium, and difficult. In this app, you can use hints to help you get through difficult levels. You can remove errors by using the clear button. You have the ability to toggle time during game play. You can also take notes with a pencil.