Daily Sudoku Challenge — 2026-06-13 (Grandmaster) — Level 2
Solve today's challenge to keep your streak alive. Each daily Sudoku is verified for a single, elegant solution.
| · | 4 | 2 | 9 | 7 | · | 1 | 5 | · |
| 6 | · | · | · | 8 | · | 4 | 3 | 9 |
| · | 1 | 9 | 4 | · | · | 2 | · | · |
| · | 7 | 5 | 6 | 3 | · | 9 | · | 1 |
| · | 6 | 3 | 7 | · | 9 | · | 8 | 2 |
| 4 | 9 | 8 | · | · | · | · | · | 3 |
| · | 8 | · | · | 1 | · | 3 | · | · |
| 7 | 3 | 1 | 8 | 9 | 4 | · | · | · |
| 9 | · | 6 | 3 | · | 7 | 8 | 1 | 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.