Kakuro Game
Fill each run with 1–9. Match its sum without repeating a digit.
Daily puzzle · UTC
Keyboard help & personal bests
Arrows move. Digits 1–9 enter values. N toggles notes. Backspace, Delete or 0 erases. Enter checks.
Progress and personal bests are saved in this browser.
How to Play Kakuro
Kakuro is a cross-sum puzzle. Fill every white cell with a digit from 1 through 9. Each consecutive horizontal or vertical run must add up to its clue, and a digit may appear only once within that run. The same digit can appear in a different run. Zero is not an answer.
A divided blue cell carries the clues. The number in its upper-right triangle is the total for the white cells immediately to its right. The lower-left number is the total for the cells immediately below it. Selecting a white cell also shows both of its run totals below the board, so you can read the clue without relying on the diagonal.
Choose an editable cell, then type a digit or use the number keypad. Notes lets you record candidates instead of final answers. Each generated board is checked for one solution from its displayed sums and fixed clues. Some boards include a few shaded starter digits to resolve ambiguity; those digits cannot be edited.
Use Sums and Intersections
A two-cell run totaling 3 must contain 1 and 2, because the digits are positive and cannot repeat. A two-cell run totaling 17 must contain 8 and 9. Their order depends on the vertical runs that cross those cells. If one of the crossing runs rules out 1, the other cell in the sum-3 run must take 1.
A three-cell run totaling 6 contains 1, 2 and 3 in some order. A three-cell run totaling 24 contains 7, 8 and 9. Do not use a repeated digit such as 2, 2, 2, even when its total matches. Start with a constrained sum, then check each candidate against the crossing run.
Repeated entries and completed runs with the wrong total are marked immediately. Check examines your entries against the unique solution and marks entries that need review. Hint supplies one correct digit and records assistance. Notes are your own working marks; review them as nearby answers change.
Daily Kakuro and Saved Practice
Easy uses a compact 4×4 board including its clue cells. Normal uses a 6×6 board and Hard a 7×7 board with more connected runs. These levels describe board size and structure, rather than a formal rating of every reasoning step. There is no countdown and you can replace an entry as often as needed.
Daily uses the same puzzle for a level and UTC date. Restart repeats that board. Practice creates another board when you choose New game. Mode and level each keep a separate saved game in this browser. Progress includes entries, notes and active playing time. Clearing browser data removes these records.
Daily completions build your personal streak and appear in the shared practice calendar. Hints are listed in your result, and the fastest-time record uses completions without aids. Arrow keys move through the white cells, N toggles Notes, and Backspace, Delete or 0 erases an entry. Enter checks the puzzle.
Frequently Asked Questions
Can I repeat a digit in a different run?
Yes. Repetition is prohibited within one consecutive horizontal or vertical run, not across the whole board.
What are the shaded starting numbers?
They are fixed starter clues used when needed to give the displayed sum grid one solution. All remaining white cells are editable.
Can I play with the keyboard?
Yes. Use arrows, digits 1–9, N for notes and Backspace, Delete or 0 to erase. Enter checks the puzzle.