Sudoku is one of the most popular crosswords of all times and has a wide audience of fans from all over the world. You need to make sure that there are numbers, letters, and other items to fill out the empty places of the Sudoku grid without repetition. Sudoku challenges are very popular to test both your brain and dexterity. The best part is that Sudoku puzzles are a very healthy brain training and keep your brain stimulated. Puzzles give you an edge and makes you smarter because it encourages you to think about the pattern of numbers and their connections. This new version of Sudoku is available on both Android and iOS smartphones. To make things interesting, it is possible to share it with your friends and complete challenges with them. Just remember, the only thing that you should not do is to give answers to other people's puzzles. If you want to have fun, you need to search the Internet for interesting Sudoku challenges.