Addoku Plus

Addoku (also known as Killer Sudoku) is a variation on the well-known Sudoku puzzle that tests your capabilities in both logic and arithmetic. It's a regular Sudoku grid, but to fill it in you need to use your knowledge of addition.Addoku Plus takes the arithmetic a step further, introducing subtraction, multiplication, and division.For a change of pace, there are also regular Sudokus to be solved.Features: - Create and solve Sudoku, Addoku and Addoku Plus puzzles - Millions of puzzles available - Ten levels of difficulty - Checkpoint and restore the puzzle state - Undo/redo - Progress information - Save your unfinished puzzle and return to it later - Online tutorial, including solving a puzzle step by step