Kakuro
The cross-sums number puzzle — like a crossword built from arithmetic. Fill every run of cells so it adds up to its clue. Three sizes, hints and mistake checking. No ads, no sign-in.
Fill each run so it adds up to its clue.
Tap a white cell, then a number. Top-right clue = sum across → · bottom-left clue = sum down ↓.
Like it? Take it offline.
Kakuro is one of 24 classics in Snackpack Brain Games — our calm, ad-free Android bundle with number puzzles, cards and strategy in one app.
- Plays fully offline — flights, commutes, anywhere
- Best times saved on your device
- 23 more games in the same app · no ads, no tracking
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How to play Kakuro
Kakuro — sometimes called cross-sums — is a number logic puzzle that looks like a crossword grid. Instead of letters you place the digits 1 to 9, and instead of word clues you have sums. Each "run" of white cells (horizontal or vertical) has a target total shown in the clue cell at its start: the number in the top-right is the total for the run going across to the right, and the number in the bottom-left is the total for the run going down. Fill in digits so each run adds up exactly to its clue.
Tips
- Hunt the extremes. Short runs with very low or very high totals have only a few possible digit combinations — start there.
- Use the crossings. Every white cell belongs to one across run and one down run; a digit must satisfy both.
- Pencil mentally. Work out which digits a run can't contain to narrow each cell down.
- Check as you go. The Check button flags any cells that don't fit, so you can catch a slip early.
Grid sizes
- Starter — a small 6×6 grid with short sums to learn the rules.
- Classic — a 7×7 grid with longer crossings.
- Expert — a dense 8×8 grid with longer sum chains.
Frequently asked questions
Is Kakuro free here?
Yes — it plays free in your browser with no ads, no sign-in, and nothing to install.
How are the clues read?
A clue cell can carry two numbers: top-right is the across (right) sum, bottom-left is the down sum.
Are my best times saved?
Yes — your fastest solve for each grid size is saved on your own device.
What's the Daily puzzle?
Toggle Daily and everyone gets the same grid on the same day, so you can compare your solve time against anyone else who played it. Switching grid size while in Daily mode still gives you a different puzzle, so the size selector isn't wasted inside a daily.
Can I play offline?
This web version needs a browser. For fully offline play and 23 more games, try the free Snackpack Brain Games app.
