Daily Sudoku Challenge — 2026-05-31 (Medium) — Level 9
Today's puzzle is generated with a unique seed, so it's truly one-of-a-kind. Compete on the daily leaderboard and beat yesterday's time.
| 4 | · | 1 | · | · | · | · | 3 | 9 |
| 7 | · | · | 1 | · | 5 | · | · | 6 |
| · | 8 | 6 | · | · | · | · | · | 7 |
| 8 | · | · | · | · | 1 | · | 5 | · |
| · | · | · | · | 2 | · | 7 | 9 | 8 |
| · | · | · | · | · | · | · | 1 | · |
| 6 | · | · | · | · | · | · | · | · |
| · | · | 8 | · | · | · | · | · | · |
| · | 5 | 7 | · | · | · | · | 8 | 1 |
Solving tips
- Scan rows, columns, and boxes for the most-frequent digit first.
- Pencil-mark candidates only when single-cell scanning stalls.
- Look for naked pairs in tight rows to eliminate options elsewhere.