Kakuro Puzzle: Play Cross Sums Online
Play this kakuro puzzle online and enjoy a number crossword where every run of white cells must add up to the clue and use each digit from 1 to 9 only once. Press New puzzle for a fresh grid in a 5 by 5, 6 by 6 or 7 by 7 size, type digits straight into the cells and press Check to see mistakes in red. Stuck? Use a hint, or open the combinations helper to see which digits can make a sum with a given number of cells. Most puzzles have a single solution and the page tells you when several fills are possible.
Kakuro Puzzle
Play a fresh kakuro puzzle in 5×5, 6×6 or 7×7 with a check button, hints and a combinations cheat sheet.
How to use the Kakuro Puzzle
- Pick a grid size and press New puzzle.
- Click a white cell and type a digit from 1 to 9. Use the arrow keys to move.
- The small number at the top right of a clue cell is the sum across, the one at the bottom left is the sum down.
- Press Check to mark mistakes, Hint for one correct cell, or Show solution.
Features
- 5×5, 6×6 and 7×7 puzzles, new every time
- Most puzzles have a single solution
- Check marks wrong cells in red
- Hint fills one correct cell
- Sum combinations helper for 2 to 9 cells
- Keyboard arrow navigation
Frequently asked questions
What are the rules of kakuro?
Fill every white cell with a digit from 1 to 9. The digits in each run of white cells must add up to the number in the clue cell before it, and no digit may repeat within a run.
Where do I read the clues?
The number at the top right of a dark clue cell is the sum of the run to the right (across). The number at the bottom left is the sum of the run below (down).
Does every puzzle have exactly one solution?
Most do. The page checks for a single solution when it builds the grid, and it tells you if a puzzle may have more than one. In that case any fill that meets every clue is correct.
How do I get better at kakuro?
Learn the short combinations. For example a sum of 3 in two cells must be 1 and 2, and a sum of 16 in two cells must be 7 and 9. The combinations helper lists them for any sum and length.
Can I check my answer without giving up?
Yes. Check only marks cells that break a clue so far, and Hint fills one cell. Show solution fills everything when you are ready to give up.