Daily Killer Sudoku May 21, 2026
The same puzzle everyone got on May 21, 2026 — deterministic, graded, and still playable.
| 22 | 17 | 23 | 12 | 19 | 6 | 10 | ||
| 21 | 18 | |||||||
| 10 | ||||||||
| 9 | 15 | 10 | 7 | 6 | ||||
| 9 | 19 | 11 | 14 | 27 | ||||
| 26 | 13 | 23 | 14 | |||||
| 1 | 14 | 8 | 9 | |||||
| 7 | 6 | 13 |
What it takes to solve
Our grader solved this puzzle in 145 steps. Every technique it needed, in ladder order:
- Naked single× 61
- Hidden single× 18
- Naked pair× 6
- Cage combinations× 60
Difficulty on Stillgrid is graded by the hardest technique a puzzle actually requires — this one earns Medium. How the technique ladder works.
Stuck on a cage? The killer sudoku calculator lists every combination a sum can take.
Also on May 21, 2026: the daily classic. Or jump to today's killer daily.