Kakuro Solver & Puzzle Builder

Enter a Kakuro from a book, newspaper, or geocache. Add its sum clues, check your numbers, get a hint, or solve the whole puzzle. All solving happens in your browser.

Puzzle grid

5 × 5
Generate a random puzzle, or choose Edit grid to build your own.

Enter clues or digits

Tap a square to edit it
Tap a square to edit it while keeping the grid in view.

Load or create

Every white square forms one connected puzzle. Larger grids can include a few blue starter digits to keep the answer unique.
Choose 3–15 rows and columns. The new grid starts with block squares; use Edit grid to paint whites and clues.
Turns a block into a clue square when a row or column of at least two white squares begins beside it. You still enter the sums.

Save or share

Import puzzle data
Your current puzzle is also saved automatically on this device.

How to use the Kakuro solver

  1. Generate a random puzzle in your preferred size, or create a grid of your own dimensions. In Edit grid mode, paint white squares, clue squares, and black blocks. Large grids automatically shrink to fit your screen.
  2. Tap either triangle of a clue square to enter its number directly, or use the Selected square editor: the upper-right number adds the white squares downward, and the lower-left number adds those across to the right.
  3. Play / enter digits allows numbers 1–9 in white squares. Press Check entries to test your work, Get hint for a logical hint, or Solve puzzle for a complete answer.

Rules: Each across and down run must total its given sum, and a digit cannot repeat in the same run. Standard Kakuro runs contain 2–9 white squares.

If a board has multiple valid answers, Solve can show one, but the page will not claim that the puzzle is unique. Use the share button to send a puzzle you've entered to someone else.