Daily Killer Sudoku October 31, 2026
The same puzzle everyone got on October 31, 2026 — deterministic, graded, and still playable.
| 12 | 13 | 8 | 17 | 17 | 9 | 6 | 14 | |
| 10 | 13 | |||||||
| 4 | 15 | 1 | 21 | |||||
| 13 | 13 | 9 | 2 | 9 | ||||
| 21 | 14 | 5 | ||||||
| 11 | 13 | 3 | 13 | |||||
| 13 | 11 | 9 | 8 | 7 | ||||
| 15 | 7 | 13 | 14 | 2 | 14 | |||
| 7 | 8 |
What it takes to solve
Our grader solved this puzzle in 139 steps. Every technique it needed, in ladder order:
- Naked single× 58
- Hidden single× 21
- 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 October 31, 2026: the daily classic.