Daily Killer Sudoku September 13, 2026
The same puzzle everyone got on September 13, 2026 — deterministic, graded, and still playable.
| 16 | 6 | 18 | 8 | 12 | 10 | |||
| 9 | 18 | 17 | ||||||
| 18 | 5 | 9 | 11 | 1 | ||||
| 16 | 4 | 23 | ||||||
| 14 | 9 | 10 | 9 | |||||
| 14 | 4 | 8 | 12 | 10 | 1 | 16 | ||
| 9 | 7 | 9 | ||||||
| 12 | 21 | 18 | 11 | |||||
| 21 |
What it takes to solve
Our grader solved this puzzle in 155 steps. Every technique it needed, in ladder order:
- Naked single× 62
- Hidden single× 17
- Naked pair× 1
- Cage combinations× 75
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 September 13, 2026: the daily classic.