Daily Sudoku Challenge — 2026-06-21 (Medium) — Level 1
Solve today's challenge to keep your streak alive. Each daily Sudoku is verified for a single, elegant solution.
| · | · | 1 | · | 6 | 2 | 8 | 5 | 7 |
| 6 | · | · | · | · | · | 4 | 9 | · |
| 5 | 2 | 8 | 9 | 4 | 7 | 3 | 6 | 1 |
| 9 | 4 | 6 | 7 | 8 | 3 | · | 1 | 5 |
| 8 | · | · | 2 | 9 | 5 | 6 | · | 4 |
| 7 | · | · | · | 1 | · | · | 3 | · |
| · | 7 | 9 | 6 | · | · | 5 | · | 3 |
| 2 | 6 | · | · | · | · | · | 4 | 9 |
| 3 | 8 | 4 | 5 | · | 9 | 1 | · | · |
Solving tips
- Pencil-mark candidates only when single-cell scanning stalls.
- Look for naked pairs in tight rows to eliminate options elsewhere.
- Hidden singles often hide inside 3×3 boxes — check them last.