Kakuro Level 21 Medium · 6×6
Level 21 of 30 · 22 cells · every run adds up to its clue, no repeats.
5
10
7
7 20
16
13
14
9
18 20
15
3 14
25
10
Cells filled 0 / 22
Fill every white cell with 1–9. Each run must add up to its clue, with no repeats.
Combination helper
Select a white cell to see which digit combinations fit its runs.
How to read the clues
The top-right clue adds across →. The bottom-left clue adds down ↓. Use 1–9 with no repeats in a run.
N notes · 1–9 enter · arrows move.
See a worked example →Progress saved on this device. Take your time.
Level 21 at a glance
| Grid | 6×6 (22 white cells) |
|---|---|
| Clues | 16 runs (8 across, 8 down) |
| Smallest / largest clue | 3 / 25 |
| Runs with only one combination | 2 |
Hints: where to start on level 21
These clues allow just one set of digits, so they're the best openings:
- 7 in 3 (down) can only be 1 + 2 + 4.
- 3 in 2 (across) can only be 1 + 2.
Where an across and a down run with known digit sets cross, the shared digit is often the only one both allow.
Level 21 solution
Show the solution (spoiler)
White cells row by row (· marks a black cell):
| · | · | 2 | 5 | · | · |
| 4 | 8 | 3 | 1 | · | · |
| 2 | 7 | · | 4 | 5 | 9 |
| 1 | 5 | 9 | · | 2 | 1 |
| · | · | 7 | 8 | 6 | 4 |
| · | · | 4 | 6 | · | · |
Learn more in Kakuro tips and combinations or review the rules.