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EnglishKakuro Puzzle Strategy and Tools on kakuro-puzzle.online
Updated
kakuro-puzzle.online supports a logic-first solving approach: use Notes to record candidate digits, cross-check each candidate against both its across and down clue sums, and rely on Check, Hint, and Undo to catch and recover from mistakes rather than guessing. The site's own guidance frames the board as "a crossword made from sums," and its rule set—digits 1–9, no repeats within a run, every white cell satisfying two clues—is what makes candidate tracking the core skill. These tools are available on the playable board; the page does not state any pricing or login requirement for gameplay, though it notes you can sign in with Google later to save progress, best times, and daily wins.
The solving loop the site describes
The page lays out a three-step method that maps directly onto the tools:
- Find the clue. Trace from a black clue cell into the connected white cells. Stop at the next black cell or the board edge—that run is the only group the clue controls.
- List legal digits. Use 1–9 only, with no repeats inside a run. A two-cell clue of 4 is 1+3, never 2+2.
- Cross-check before entering. Every white cell belongs to both an across run and a down run, so a candidate is only useful if it satisfies both sums at once.
The site also flags the three most common errors: treating a clue as a whole row, allowing a repeated digit inside a run, and forgetting that each white cell must satisfy two clues.
How each tool fits the strategy
| Tool | What it does | When to use it |
|---|---|---|
| Notes | Marks candidate digits in a cell | After listing legal digits for a run, before committing |
| Check | Reveals conflicts | Only when you're ready—the page says to press it "only when you are ready to reveal conflicts" |
| Hint | Assists when stuck | When cross-checking stalls and you want to keep momentum |
| Undo | Reverses entries | After a wrong entry or a Check that exposed an error |
| Number pad | Enters digits 1–9 | For every confirmed entry |
The board accepts normal Kakuro entries—you don't type equations or submit words.
A worked example from the site
The page's own walkthrough shows the cross-check in action: a yellow 3 clue on the left points to two white cells beside it. Those cells must add to 3 without repeating, so the only legal pair is 1+2. The instruction is to tap the first highlighted cell and press 1. From there, the second cell's value is constrained by its down clue as well—which is exactly why you check both sums before entering.
Practical habits that follow from the rules
- Start with the most constrained runs. Short runs with low or high sums (like the 3 above, or a two-cell 16, which can only be 7+9) have the fewest legal combinations.
- Treat Notes as scratch work, not answers. A candidate that satisfies the across sum but not the down sum should be eliminated, not entered.
- Use Check sparingly. Because it reveals conflicts rather than confirming correctness, leaning on it repeatedly can turn a logic puzzle into trial and error.
- Prefer Undo over Reset for single mistakes; Reset clears the board.
Where this fits in the site's modes
The same board and tools apply across the site's modes—Regular (200 levels), Daily (5 puzzles today), Unlimited (7x7 verified seeds), and Battle (3, 5, or 8 puzzle challenges)—with a level selector from 1 to 9 and a status bar showing filled cells, time, best time, and issues. The page does not detail differences in tool availability between modes, so treat the strategy above as the baseline for all of them.