Sudoku 4ever Free for Android

Unlimited number of puzzles, eight difficulty levels, world-class hint engine, game statistics and global high scores - simply the best Sudoku app on the market.(1) Game Play* 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* OpenFeint integration with global leaderboards for each difficulty level and achievements to earn Feint points* Game statistics: fastest, average, slowest times and total time played for each difficulty level* Extremely configurable* The integrated solver solves any Sudoku in milliseconds(2) Supports* Portrait and landspace mode* All screen types and sizes* Touch screen, keyboard and trackball* Installation on external storage (e.g. sdcard)* Android 1.6-3.1(3) Hint Functionality* Full House* Hidden Single, Pair, Triple & Quad* Naked Single, Pair, Triple & Quad* Locked Candidates (Pointing + Claiming)* Locked Pair & Triple* X-Wing* Swordfish* Jellyfish* XY- and XYZ-Wing* Uniqueness Test type 1, 2, 3, 4 and 5* BUG+1, BUG+2, BUG+3 and BUG+4* Aligned Pair Exclusion* Aligned Triple Exclusion* Bidirectional Cycles* Forcing X-Chains (Turbot Fish)* Forcing XY-Chains* Nishio Forcing Chains* Double Forcing Chains* Contradiction Forcing Chains* Region Forcing Chains* Cell Forcing Chains(4) Permissions* Network Communication / Full Internet Access: ads and OpenFeint (global leaderboard, achievements)* Network Communication / View Network State: OpenFeint* Storage: OpenFeint offline modeIf you like the game, don't forget to rate it!The free version is supported by unobtrusive adsRecent changes:Initial VersionContent rating: Everyone