Mathdoku (also called KenKen® and Calcudoku) is a math and logic puzzle similar to Sudoku. In MathDoku Notable, in addition to being able to note candidates for each cell, you can also note combinations of candidates for each cage. By using the cage note feature, you can solve high difficulty level puzzles more easily. FEATURES - Can note combinations of candidates for each cage - Cell/Cage note copy & paste - 3x3 to 9x9 grid sizes - Unlimited number of puzzles for 3x3 to 7x7 sizes - Total 1200 puzzles for 8x8 and 9x9 sizes - Three difficulty levels(Easy, Medium, Hard) - Cell/Cage note check modes - Unlimited undo and redo - Light and Dark color schemes - Exporting/Importing games