Daily Sudoku Challenge — 2026-05-25 (Grandmaster) — Level 4
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.
| · | 8 | 4 | · | 2 | · | · | 6 | 5 |
| 2 | 7 | 9 | · | 6 | 5 | 1 | 3 | · |
| · | · | · | · | · | 7 | · | · | 2 |
| · | · | 6 | 2 | · | · | 3 | · | 8 |
| 7 | · | · | · | 3 | 4 | · | 5 | · |
| 3 | · | 1 | · | · | 8 | · | · | · |
| · | 1 | · | 5 | · | · | 8 | · | · |
| · | 6 | · | 1 | 8 | · | 5 | 4 | · |
| · | 5 | 2 | 7 | 4 | 3 | 6 | 1 | 9 |
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.