CalcuDoku

So-called 'Square Wisdom' puzzles go under many different names but the rules are always the same. You are supposed to solve the puzzle by applying your arithmetic skills, using addition, multiplication, division and subtraction. Oh, and you may not repeat numbers in rows and columns.

This application contains mostly puzzles of moderate difficulty with a few introductory puzzles for complete beginners but also some tough ones for experienced aficionados.

Many features are here to enhance your solving experience: automatic pencil marks to help you with number combinations, manual pencil marks to scribble down your math, multiple level undo/redo, hints and instructions.

All puzzles have one solution only, which can be reached by logic and you never need to resort to guessing.