Kakuro: today's puzzle
Today's puzzle
Loading ยท the grid and its level
(a small spoiler)
Checked: exactly one solution, reachable by logic. The level is the hardest technique our solver needed, not the grid size.
Settings
Rule breaks (a repeated digit in a run) always show in red. "Show mistakes" also marks cells that disagree with the solution.
Each white run (across or down) must add up to the clue in the dark cell at its start, using the digits 1 to 9 with no digit repeated inside the run. Every daily Kakuro has exactly one solution.
The rules in three lines
- Write a digit from 1 to 9 in every white cell.
- The digits of each across run add up to the clue on its left; the digits of each down run add up to the clue above it.
- No digit appears twice in the same run.
Kakuro is also known as cross sums; one grid is a cross sum. Full rules and a worked example.
Today's levels and our bank
Each day has 4 Kakuro puzzles, one per level below. The bank covers 512 days, from 16 October 2026 to 10 March 2028, and every one of its 2,598 puzzles was checked for a single solution by a separate program before it shipped.
| Daily puzzle | Size | Days in the bank | Median steps | Hardest technique, most often (share) |
|---|---|---|---|---|
| Easy | 7x7 | 512 | 49 | Unique sums (100%) |
| Medium | 8x8 | 512 | 66 | One place left (97%) |
| Hard | 8x8 | 512 | 70 | Full run analysis (100%) |
| Expert | 10x10 | 512 | 132 | Contradiction (100%) |
Source: the Gridaday bank, 2,048 puzzles of Kakuro graded by our solver; data as of 2026-10-17.
Sums with only one answer
Kakuro is arithmetic you can see. Some sums can be made only one way: 3 in two cells is always 1 and 2, 17 in two cells is always 8 and 9, 6 in three cells is 1, 2 and 3. Where such a run crosses another one, the shared cell often has a single digit left, and the puzzle opens from there.
Bigger grids, longer chains
Our Easy grids need nothing beyond those unique sums and the crossings. Medium grids ask you to find a digit that every way of making a sum needs. Hard grids need runs worked through cell by cell, and Expert grids a short contradiction.
Questions
Do I need to know the combinations by heart?
No. The combinations page lists every sum for 2 to 9 cells and has a calculator that leaves out the digits you exclude.
Can a digit repeat in a row?
Only if the two cells belong to different runs, separated by a dark cell. Inside one run, never.
What are the small digits in a cell?
Notes: switch Notes on and tap digits to pencil in candidates. A drag selects several cells at once.
Are these cross sums puzzles free?
Yes. All our kakuros, the daily grids, the archive, unlimited play and the printable sheets, are free and need no sign-up.