Kakuro Helper

Narrow a clue to the exact digit sets that still fit. Choose a run length, enter the clue sum, then filter by digits that must appear or must be excluded.

This helper is best for stubborn runs where you know part of the story already from crossing clues. If you want the full reference table, use the Kakuro combinations chart.

Calculator

Results

Matching combinations
4
Candidate digits
{1, 2, 3, 4, 5, 6, 7}
Forced digits
None
  • {1, 2, 7}
  • {1, 3, 6}
  • {1, 4, 5}
  • {2, 3, 5}

How to use it in a real puzzle

  1. Count the cells in the run and enter the clue sum.
  2. Add any digits already forced by crossing runs to the “must appear” field.
  3. Add digits ruled out by crossings to the exclude field.
  4. Use the remaining combinations to update candidates in the grid.
  5. If the helper shows forced digits, those digits must appear somewhere in the run.

Example

Suppose you have a 4-cell run with clue 19. The full combination list is {1, 2, 7, 9}, {1, 3, 6, 9}, {1, 3, 7, 8}, {1, 4, 5, 9}, {1, 4, 6, 8}, {1, 5, 6, 7}, {2, 3, 5, 9}, {2, 3, 6, 8}, {2, 4, 5, 8}, and {2, 4, 6, 7}. If a crossing clue tells you the run must contain 8 and cannot contain 1, the list drops to {2, 3, 6, 8} and {2, 4, 5, 8}. That is exactly the kind of narrowing this helper is built for.

Related guides

Full combinations chart Kakuro tips and tricks Combination pruning Cross sums Play free Kakuro

More puzzle games

If you like deduction-heavy number puzzles, try Ruedoku for classic Sudoku logic or Free Takuzu for binary pattern solving.