Sudoku is a logical puzzle consisting of a 9x9 grid, divided into 9 blocks, each with 3x3 cells.
The goal is to fill in the empty cells, one number in each, so that each row, column and block contains the numbers
1-9 exactly once. Each number in the solution therefore occurs only once in each of three "directions" (wikipedia).
Key Features:
Generate thousands of puzzles in 6 levels of difficulty
Copy a puzzle from a newspaper or create your own
Load a puzzle by ID (way of sharing puzzles)
Auto Save / Load game
Selectable fonts for numbers and pencil marks
Skinable user interface
Free lifetime upgrades!
Playing Sudoku:
2 basic input modes ("sticky digits" or "tap&select")
Possibility to pause
Undo / Redo
Statistics
Available Helpers:
Puzzle solver
Pencil marks - manual or maintained by the program