Cross Sums puzzles, also known as Kakuro puzzles, are challenging yet fun and easy to learn. More addictive than Sudoku - try Kakuro puzzles and see for yourself. Create an unlimited number of Cross Sums puzzles with Amigos Cross Sums. All puzzles have a unique solution. Choose from 5 difficulty levels and 3 grid sizes. Print or solve on screen. Examples, solving hints and techniques are included in the program.