Arrows select ·1–9 enter ·N toggles notes ·Backspace erases ·Z undoes
Kakuro
Cross the sums. Fill each white run with distinct digits 1–9 and make both clues agree.
Edits0
Cleared0/99
About Kakuro
Play Kakuro online through 99 original, uniquely solvable cross sums. Each short run has its own sum and no-repeat rule; intersecting runs give each white cell two constraints. These puzzles and hand-drawn artwork were independently created for this site.
The board starts with some fixed digits to make the sums approachable. Small grids introduce short sums before larger, more connected puzzles. You can use notes and correct entries freely; completion is checked against the actual run rules.
How to play Kakuro
- 01A number in the upper right triangle is the sum of the white cells to its right; a number in the lower left is the sum below it. Black cells divide runs.
- 02Use digits 1–9, without repeating a digit within one run. The same digit may appear in separate runs. Every white cell belongs to one across and one down run.
- 03Small ink digits are starting clues and cannot be edited. Select an empty cell, then enter a digit. Notes pencil in possibilities; they are not final answers.
- 04Every one of the 99 independently generated puzzles has one verified solution. Fill all white cells correctly to finish. Conflicting entries remain editable; there is no lives limit.
- 05Undo restores the previous edit, Restart restores this puzzle and Hint fills one correct cell. Progress and completion are saved on this browser when storage is available.
Kakuro controls
- Select and enter
- Tap a white cell then a keypad digit, or focus a cell and type 1–9. Arrows move between editable cells.
- Notes and recovery
- N toggles notes, Backspace/Delete erases and Z undoes. Starting digits cannot be changed.
- Help
- The selected cell shows possibilities derived from both runs, not a hidden answer. Hint fills one correct cell and records its use.
Kakuro: levels and progress
There are 99 original puzzles: 18 small 5×5, 36 medium 7×7 and 45 large 9×9 grids including clue cells. Some digits are given. Empty cells increase from 4–9 to 11–22 and 23–36; difficulty also depends on the intersections.
The current puzzle, accepted edit history and completed levels are stored locally when allowed. Clearing browser data removes them. No account, cloud sync or download is required.
Kakuro tips and strategies
Start with tight sums
Two cells totaling 3 have only the digits 1 and 2; a crossing clue decides their order. Larger sums such as 17 similarly force 8 and 9.
Use intersections
A run totaling 10 in four cells must use 1, 2, 3, 4. Cross it with another run and remove digits that cannot belong to both. Notes keep alternatives visible without committing them.
Read the clue direction
The upper-right triangle points right; the lower-left points down. A grey separator starts a new run, so repeated digits on opposite sides do not conflict.
- Two distinct digits totaling 3 must be 1 and 2; totaling 17 must be 8 and 9.
- Intersect the possibilities from both clues before placing a digit.
- A red run cannot satisfy its sum and no-repeat rule with the current entries. Erase or undo an entry; this is not a failed round.
Kakuro FAQ
What is Kakuro?
Kakuro, also called cross sums, is a number crossword. Each horizontal and vertical run must match its clue using digits 1–9 without repeats.
How many puzzles are here?
There are 99 original puzzles: 18 small 5×5, 36 medium 7×7 and 45 large 9×9 grids including clue cells. Some digits are given. Empty cells increase from 4–9 to 11–22 and 23–36; difficulty also depends on the intersections.
Is this a Sudoku game?
No. It uses run sums and no repeated digits inside each run, with no Sudoku boxes or whole-row 1–9 requirement.
Do hints or notes use lives?
No. Notes are editable possibilities. Hint fills a correct digit and records a hint used; wrong entries can be corrected without ending the puzzle.
Can I continue later?
The current puzzle, accepted edit history and completed levels are stored locally when allowed. Clearing browser data removes them. No account, cloud sync or download is required.