Kakuro Solver

build · check · solve step by step
Build: Click any cell to toggle black/white. Click a black cell that borders white cells to enter its clue numbers — select across or down, then use the numpad. For white cells, click to select, numpad to pre-fill a digit. Then Check and Solve.
Grid Size
Click a cell to toggle black/white. Click a black clue cell to enter run totals.
▶ Play Kakuro instead
Solution Steps
Build your puzzle, then click ② Check and ③ Solve It.
Ready

Kakuro Solver: rules, how to use it, tips

A crossword with digits: each run of white cells adds up to its clue, using 1–9 without repeats.

The rules

  1. The grid has black clue cells and white cells. A clue cell shows the total for the run of white cells to its right (across) and/or below it (down).
  2. Fill every white cell with a digit from 1 to 9.
  3. The digits in a run must add up to its clue.
  4. No digit may repeat within a run.

Using the solver

  1. ① Build: click cells to toggle black and white. Click a black cell next to white cells to enter its across and down totals.
  2. Pre-fill any digits you already know with the keypad.
  3. ② Check, then ③ Solve: step through each run combination and crossing, explained.
  4. Or press Send to Solver inside the Kakuro game to import a puzzle.

Tips

The full guide, with a worked example and common mistakes: How to play Kakuro.

Questions

What does a clue cell with two numbers mean?

The number in the upper-right is the total for the run going across; the one in the lower-left is the total for the run going down.

Are there combination charts for Kakuro?

Yes — see the Kakuro combinations chart, which lists every total for runs of 2 to 9 cells and marks the ones with a single combination.

Can I solve a Kakuro from a book?

Build it in the Kakuro Solver: click cells to make them black, enter the clues, then solve step by step.

Is Kakuro harder than Sudoku?

It needs some arithmetic and combination knowledge, but the logic is similar. Easy Kakuro is a good next step after Sudoku.

What is the largest run?

Nine cells, which must contain every digit 1–9 and so always totals 45.

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