Unlimited number of puzzles, eight difficulty levels, world-class hint engine and game statistics - simply the best Sudoku app on the market. **••••• Game Play •••••** ★ Eight different Sudoku variants: Classic & Jigsaw puzzles (aka Squiggly), Asterisk-, Centerdot-, Color-, Hyper-, Percent- & X-Sudokus ★ Eight difficulty levels: very easy, easy, moderate, advanced, hard, very hard, fiendish, nightmare ★ Six input methods (digit first, cell first, mixed, Andoku cell first, Andoku digit first, popup) ★ Pencil marks with auto set or auto erase ★ Persistent undo/redo ★ Auto save ★ Bookmarks ★ Highlighting of selected digits and pencil marks ★ Highlighting of completed digits ★ Highlighting of incorrect digits ★ Coloring mode (cells and pencil marks) to support coloring solving techniques ★ Very advanced hint functionality ★ Analysis functionality to rate the difficulty of a Sudoku puzzle and to get a detailed list of required solving techniques ★ Game statistics: fastest, average, slowest times and total time played for each difficulty level ★ Extremely configurable ★ The integrated solver solves any Sudoku in milliseconds **••••• Supports •••••** ✔ Portrait and landscape mode ✔ All screen types and sizes ✔ Touch screen, keyboard and trackball ✔ Installation on external storage (e.g. sdcard) ✔ Android 1.6-4.x **••••• Hint Functionality •••••** ★ Full House ★ Hidden Single ★ Hidden Subset (Pair, Triple + Quad) ★ Naked Single ★ Naked Subset (Pair, Triple + Quad) ★ Locked Candidates (Pointing + Claiming) ★ X-Wing (Regular, Finned + Sashimi) ★ Swordfish (Regular, Finned + Sashimi) ★ Jellyfish (Regular, Finned + Sashimi) ★ XY-, XYZ-, WXYZ-, VWXYZ-, UVWXYZ-, TUVWXYZ-, STUVWXYZ-, RSTUVWXYZ-Wing ★ W-Wing ★ Almost Locked Candidates (Pair, Triple + Quad) ★ Avoidable Rectangle (type 1 + 2) ★ Hidden Unique Rectangle ★ Uniqueness Test (type 1, 2, 3, 4 + 5) ★ BUG+1, BUG+2, BUG+3 and BUG+4 ★ Aligned Pair + Triple Exclusion ★ Sue de Coq ★ ALS-XZ, ALS-XY-Wing ★ Remote Pairs ★ Bidirectional Cycles ★ Forcing X-Chains ★ Forcing XY-Chains ★ Nishio Forcing Chains ★ Double Forcing Chains ★ Contradiction Forcing Chains ★ Region Forcing Chains ★ Cell Forcing Chains If you like the game, don't forget to rate it! The free version is supported by unobtrusive ads