Sudoku 4ever Plus

Developer's DescriptionBy 2 Zombie GamesUnlimited number of puzzles, eight difficulty levels, world-class hint engine and game statistics - simply the best Sudoku app on the market.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-SudokusEight difficulty levels: very easy, easy, moderate, advanced, hard, very hard, fiendish, nightmareSix input methods (digit first, cell first, mixed, Andoku cell first, Andoku digit first, popup)Pencil marks with auto set or auto erasePersistent undo/redoAuto saveBookmarksHighlighting of selected digits and pencil marksHighlighting of completed digitsHighlighting of incorrect digitsColoring mode (cells and pencil marks) to support coloring solving techniquesVery advanced hint functionalityAnalysis functionality to rate the difficulty of a Sudoku puzzle and to get a detailed list of required solving techniquesGame statistics: fastest, average, slowest times and total time played for each difficulty levelExtremely configurableThe integrated solver solves any Sudoku in milliseconds----- Supports -----Portrait and landscape modeAll screen types and sizesTouch screen, keyboard and trackballInstallation on external storage (e.g. sdcard)Android 1.6-4.x----- Hint Functionality -----Full HouseHidden SingleHidden Subset (Pair, Triple + Quad)Naked SingleNaked 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-WingW-WingAlmost Locked Candidates (Pair, Triple + Quad)Avoidable Rectangle (type 1 + 2)Hidden Unique RectangleUniqueness Test (type 1, 2, 3, 4 + 5)BUG+1, BUG+2, BUG+3 and BUG+4Aligned Pair + Triple ExclusionSue de CoqALS-XZ, ALS-XY-WingRemote PairsBidirectional CyclesForcing X-ChainsForcing XY-ChainsNishio Forcing ChainsDouble Forcing ChainsContradiction Forcing ChainsRegion Forcing ChainsCell Forcing ChainsIf you like the game, don't forget to rate it!