Try kakuro
About this idea
Master kakuro, the mathematical crossword that combines Sudoku logic with addition. Fill the grid so groups of numbers add up to clues without repeating digits within each group.
On this page
How to get started
understanding the rules (10 minutes)
- Grid structure: White cells for numbers (1-9), shaded cells contain sum clues
- The goal: Fill white cells so each run adds to the clue number
- No repeats: Within each run, no digit appears twice
- Example: Clue '10 in 2' could be 1+9, 2+8, 3+7, or 4+6
basic strategies (15 minutes)
- Learn combinations: Memorize common sums (3 in 2 = 1+2 only, 17 in 2 = 8+9 only)
- Start with limits: Two-cell runs with extreme sums have few options
- Cross-reference: Where runs intersect, numbers must satisfy both clues
- Elimination: Use Sudoku-like logic to eliminate impossible numbers
practice resources (5 minutes)
- Free apps: Kakuro app by Conceptis, Web Sudoku Kakuro section
- Online: Kakuro.com, Puzzle Baron's Kakuro
- Start easy: 6x6 grids, simple sums, work up to 12x12+
practice daily
- Combination tables: Create reference chart of all possible combinations
- Pattern recognition: Common intersections become familiar
- Pencil marks: Note possible numbers in corners like Sudoku
- Speed improves: First puzzle may take 20+ minutes, eventually solve in 5-10