Sudoku Brain - All free and high quality problems

Sudoku Brain is awesome graphics, user interface, and ease of use. You can play over 4000 problems by completely free. ▽What is Sudoku? Sudoku is a simple, classic puzzle game that's taken the world by storm. Having originated in Japan as a pencil puzzle game, Sudoku became extremely popular all over the world as a single-player pursuit. ▽About Sudoku Brain Why we made the Sudoku Brain app: We want you to be absorbed into the world of Sudoku. So we made Sudoku Brain both simple to use and able to hold a higher volume of new and interesting problems. Even though Sudoku Brain is very simple to use it has rich features yet is stress-free. For example most of it’s features are intuitive - - We don’t need to read a how to manual. We have prepared a variety of sudoku versions “Classic”,small 6X6”Mini”,”Diagonal”,”Jigsaw”and”Mixed”. Of course you can play it on or off line. ________________________________ You can play extensive variety (variant) Sudoku problems! All problems are high quality. - Classic (9x9) - Mini (6x6) - Diagonal - Jigsaw - Mixed (Diagonal & Jigsaw) ________________________________ Great features. - Auto save. - Continuous input numbers/pencil marks. - Double tap to highlight same numbers. - Auto delete pencil marks, when you input number. - Undo & Redo. - Checking conflicts numbers. - Beautiful sound effects. - Also, you can play game with your favorite musics. ________________________________ Difficulty - First step - Second step - Beginner - Easy - Normal (Medium) - Advanced - Super Advanced - Incredible