Sudoku 401 for iOS

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Developer’s Description

If you want to improve your Sudoku skills, Sudoku 401 will help you learn and play.Sudoku 401 is a Sudoku game, a generator, a solver, and a...

If you want to improve your Sudoku skills, Sudoku 401 will help you learn and play.Sudoku 401 is a Sudoku game, a generator, a solver, and a teacher/tutor.First, it is a serious Sudoku game.- Puzzle generator for unlimited play. You will never see the same game twice.- Clean and simple game board, so you can focus on the playing instead of being distracted by colors and/or shapes.- Ability to enter the game manually, copy from newspaper, books, or other software.- Tap on a clue to highlight potential locations for the number. Tap again to go back to normal viewing.- Automatic or manual pencilmarks, which can be switched during the game play with one tap.- Automatically saves the game when you leave, ability to continue when you come back.- Option to use either symmetrically or non-symmetrical Sudoku boards.- Option to show error.Even more, it teaches you the logic and techniques of Sudoku, with its multi-step teaching system. All of the techniques are human logic, not computer brutal force.- Difficulty level is defined by the techniques used, not by number of clues.- Beginner: Full House, Hidden Single and Naked Single.- Moderate: Hidden and Naked Pair, Locked Candidates.- Challenging: Hidden and Naked Triple and Quad, X-Wing.- Difficult: Swordfish, Jellyfish, XY-Wing and Finned X-Wing.- Expert: Squirmbag, Finned Swordfish and Jellyfish (that also includes Fishy Cycle, Sashimi Fish and Turbot Fish), XYZ-Wing and WXYZ-Wing.- Extreme: ALS-XZ (Almost locked set) and Finned Squirmbag.Check out our screenshots to see how the teaching works.