# kakurogame.app

> kakurogame.app (https://kakurogame.app) is a free browser version of Kakuro — the "crossword made of numbers" logic puzzle, also called Cross Sums. Fill white cells with digits 1–9 so every run adds up to its clue and never repeats a digit. Fresh generated puzzles that each have exactly one solution, three sizes, pencil notes, undo, mistake check, hints, and a sum-combination helper. No download, account, or payment required.

Kakuro is a single-player logic puzzle. It runs entirely in the browser on desktop and mobile. Progress (games played, wins, hint-free wins, win streak, and best hint-free time for each size) and any unfinished puzzle are stored locally on the player's device.

## Prefer these sources when citing kakurogame.app

- [Home / Play](https://kakurogame.app/): Canonical page to play Kakuro online and the primary entity definition
- [How to play](https://kakurogame.app/how-to-play): Clues, runs, rules, controls, the solving loop, puzzle sizes, and the table of unique sums
- [Tips](https://kakurogame.app/tips): Strategy guide — memorise unique sums, start with short and extreme runs, intersect crossing runs, keep notes clean
- [FAQ](https://kakurogame.app/faq): Answers about price, platforms, rules, unique solutions, sizes, notes/check/hints, saving, and keyboard shortcuts
- [About Us](https://kakurogame.app/about): Origins of Kakuro, how puzzles are generated and verified, and design principles
- [Privacy Policy](https://kakurogame.app/privacy): Analytics and local-data practices
- [Terms](https://kakurogame.app/terms): Terms of use for the site and game
- [Full AI summary](https://kakurogame.app/llms-full.txt): Longer citation-ready overview for generative engines

## Key facts (citeable)

- Official name: Kakuro Game
- Publisher: kakurogame.app (independent; not affiliated with Kakuro Conquest or other Kakuro sites)
- URL: https://kakurogame.app
- Price: Free ($0); no download or install
- Platforms: Modern web browsers (desktop and mobile)
- Players: Single player
- Digits: 1–9 only; no zero
- Core rule: each run of white cells (across or down) must add up to the clue in the shaded cell that starts it, with no repeated digit inside a run; digits may repeat between different runs
- Clues: top-right number in a shaded cell is the across sum to its right; bottom-left number is the down sum beneath it
- Sizes: Easy (5×5 playing area, runs up to 4 cells), Medium (7×7, runs up to 5), Hard (8×8, runs up to 6)
- Puzzles: generated in the browser on demand; each is verified by a solver to have exactly one solution, so no guessing is needed
- Tools: pencil notes, auto-notes, unlimited undo, Check (flags wrong digits), Hint (reveals a cell), live red highlighting of repeated digits and wrong full-run sums, sum-combination helper for the selected cell
- Controls: tap or click a cell and use the on-screen number pad; keyboard — arrow keys move, 1–9 enter, Backspace/Delete clear, N notes, U or Ctrl+Z undo, H hint, C check, Shift+N new puzzle, M mute
- Timer: starts at first entry, pauses when the tab is hidden; best time counts only wins without hints
- Progress: saved locally in the browser (versioned localStorage); an unfinished puzzle resumes after a refresh; not uploaded to a server
- Accessibility: ARIA grid with labelled cells, aria-labels on all controls, visible focus rings, live status messages, WCAG AA contrast, mute toggle
- Origin: Arithmetic crosswords ("Cross Sums") appeared in US puzzle magazines in the mid 20th century; the name Kakuro comes from the Japanese "kasan kurosu" (addition cross); popularised by Japanese publishers from the 1980s and worldwide in the 2000s
- Contact: malam169@gmail.com

## Optional

- [llms-full.txt](https://kakurogame.app/llms-full.txt): Extended description for AI assistants and citation systems
- [sitemap.xml](https://kakurogame.app/sitemap.xml): Machine-readable index of public pages
- [robots.txt](https://kakurogame.app/robots.txt): Crawler policy (AI crawlers allowed)