Challenge your logic and arithmetic skills with Kakuro puzzles. Fill the grid with numbers 1-9 where each run sums to the clue without repeating digits.
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Last updated: 12/11/2025, 2:37:37 PM (Server Time)
Kakuro is a logic puzzle often called a "cross-sum" puzzle, combining elements of Sudoku and crosswords. It was invented in 1950 by Canadian Jacob E. Funk and gained popularity in Japan before spreading worldwide. The name "Kakuro" comes from the Japanese words for "addition" and "cross."
1. Start with runs that have only one possible combination of numbers.
2. Look for runs with small sums (they have fewer possibilities).
3. Use the "no repeats" rule to eliminate possibilities.
4. Work on intersecting runs to narrow down options.
5. Keep track of possible numbers for each cell (pencil marks).
6. Use logical deduction rather than guessing.
Unique Combinations: Some sums have only one combination (like 3 in two cells must be 1+2).
Cross-Referencing: Use intersecting horizontal and vertical runs together.
Elimination: Remove numbers that would cause repeats in other runs.
Minimum/Maximum Analysis: Determine possible ranges for cells based on run sums.
Yes! Kakuro is excellent for developing mental arithmetic, logical thinking, and problem-solving skills. It requires addition skills, pattern recognition, and systematic thinking. Regular Kakuro practice can improve calculation speed, number sense, and logical reasoning abilities.
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