คักกุโระ (originally called Kakuro or Cross Sums) is a logic-based, math puzzle. The objective of the puzzle is to insert a digit from 1 to 9 inclusive into each white cell such that the sum of the numbers in each entry matches the clue associated with it and that no digit is duplicated in any entry. FEATURES: - modern layout - five different difficulties - hundreds of puzzles for each difficulty - auto-save your progress for each puzzle - unlimited undo/redo - color input system for experts - clean interface and smooth controls - google play games achievements - phones and tablets support HELPFUL FEATURES (optional): - selection modes: select first or number first - pencil modes: automatic or manual - keyboard configuration: auto, three rows, two rows, one row - direction highlight: vertical and horizontal highlight - rule violations: game rule warnings highlight - sum errors: calculate if the sum is correct or not - sum combinations: show all pos...