Daily Killer Sudoku October 21, 2026
The same puzzle everyone got on October 21, 2026 — deterministic, graded, and still playable.
| 14 | 4 | 9 | 20 | 24 | ||||
| 20 | 16 | 21 | 14 | |||||
| 12 | 13 | |||||||
| 24 | 22 | 10 | 4 | |||||
| 6 | 3 | 145 | ||||||
| 13 | 16 | 9 | 12 | 17 | 16 | |||
| 6 | ||||||||
| 13 | 12 | 17 | 20 | 8 | ||||
| 9 |
What it takes to solve
Our grader solved this puzzle in 145 steps. Every technique it needed, in ladder order:
- Naked single× 55
- Hidden single× 22
- Naked pair× 3
- Hidden pair× 1
- Cage combinations× 64
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 October 21, 2026: the daily classic.