Supreme Sudoku

A friendly, beautiful, material-design Sudoku player. Features •  Clean user interface •  Easy input methods. Select a cell, or select a number on the keypad. •  Pencil marks and auto-pencil. You can mark cells with small numbers, or turn on auto-pencil to have the app do this tedious job for you. •  An inbuilt custom-made solving engine. Contains a multitude of solving techniques and in-depth descriptions which guide you through the logic behind each step. •  An Infinite amount of Sudokus! Comes with a Sudoku generator which generates Sudoku's on the fly. You'll never run out of Sudokus again! •  Sudoku importer. Take a photo of a Sudoku and import it ready to play on your device. •  Unlimited saves. Play and save as many Sudokus as you wish, you can come back to them at any time. •  Unlimited undo/redo. Made a mistake? No worries. •  Error checker. A simple button press shows you any mistakes on the board. Solving Techniques •  Hidden/Naked Singles, Pairs, Triples and Quads •  Candidate Lines/Block •  Box-line Reduction •  B.U.G. (Bi-value Universal Graveyard) •  X-Wing, XY-Wing, XYZ-Wing •  SwordFish •  Unique Rectangles (Type 1 and 2) •  Simple Colouring •  X-Cycles •  XY-Chain •  3D Medusa Chain •  Alternating Inference Chains (A.I.C.'s) •  Aligned Pair Exclusions