The main objective? Provide you the best possible user experience by transforming the digital surface into a support as pleasant and fun as newspaper puzzle page. Choose any level you like. Play easier levels to exercise your brain, logical thinking and memory, or try the hardest to give your mind a real workout. Our classic puzzle game has some features that make game easier for you: hints, auto-check,.. You can use them or complete the challenge without help - it' up to you! What's more, every puzzle has just one correct solution. Main features • Unlimited undos. Made a mistake? Just put it back quickly! • Pencil mode allows you to make assumptions • The eraser allows you to correct an error • Hints guide you throughout the game Main parameters • Limitation (or not) of the number of errors • Error display in real time or at the end of the game only • Highlighting a row and a column related to the selected cell • Highlighting impossible combinations Highlights • An infinity of well-formed puzzles • Auto-save. If you leave a sudoku unfinished it will be saved. • Four levels of difficulty perfectly balanced: easy, average, difficult and insane • Support both phones and tablets • Portrait and landscape mode for tablets • Simple and intuitive design with several themes. Choose one of four appearances for a better playing comfort, even in the dark • Ability to generate other puzzles on the fly