Daily Sudoku Challenge — 2026-05-30 (Hard) — Level 4
A fresh, hand-tuned Sudoku awaits. Today's grid balances logic and intuition — perfect to sharpen your mind in under 15 minutes.
| · | 8 | 5 | 1 | · | · | 4 | · | 7 |
| 7 | 4 | · | · | 3 | · | 6 | · | · |
| 6 | · | · | · | · | 7 | · | 8 | · |
| 1 | · | · | · | · | 8 | · | 6 | 3 |
| · | 5 | · | · | 2 | · | 1 | · | 8 |
| · | 6 | 8 | · | · | 4 | 2 | · | 5 |
| · | 9 | 2 | · | · | · | · | 1 | 6 |
| 5 | · | 3 | 4 | · | 1 | 8 | 9 | 2 |
| · | 1 | 6 | · | · | 2 | 3 | · | 4 |
Solving tips
- Hidden singles often hide inside 3×3 boxes — check them last.
- When stuck, restart your scan from the digit with fewest candidates.
- Scan rows, columns, and boxes for the most-frequent digit first.