Verified daily Sudoku challenge
Daily Sudoku for July 31, 2026
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Available through: August 15, 2026
Four verified puzzles
Easy
| 1 | | | 5 | | | | 4 | 8 |
| | | | 1 | | | 9 | | |
| | 6 | 9 | 3 | | | | | 1 |
| | 2 | | | | | | 1 | |
| 3 | | | | | | | | 5 |
| | | | | | 8 | 7 | 9 | |
| | | | | | 5 | | | 6 |
| 8 | | 5 | 7 | | 6 | | | |
| | | | | 1 | 2 | 5 | | |
- Puzzle ID
LDI0-160237f2bdbd41d299d7e553bdb5415d8837e360- Clue count
- 26
- Unique solution
- Verified
- LDI v0 score
- 9
- Tier
- Easy
- Hardest technique
- Hidden Single
- Logical steps
- 55
Verified key step: Naked Single: place 2 at row 3, column 7.
Medium
| | 3 | | | | 5 | | 9 | |
| | | | 6 | 9 | | | | 2 |
| 7 | 2 | | | 3 | | | | 1 |
| | | 7 | | | | 1 | | |
| 8 | | | | | | | | 6 |
| | | 5 | | | | 3 | | |
| 9 | | | | 7 | | | 6 | 3 |
| 3 | | | | 6 | 2 | | | |
| | 8 | | 1 | | | | 2 | |
- Puzzle ID
LDI0-2be9cbd249db78e4d97bbf47ad0c3c86b336d75c- Clue count
- 26
- Unique solution
- Verified
- LDI v0 score
- 20
- Tier
- Medium
- Hardest technique
- Hidden Single
- Logical steps
- 55
Verified key step: Hidden Single: place 3 at row 2, column 8.
Hard
| | | 8 | 7 | | 2 | | | |
| 5 | | | 1 | | | | | |
| | 7 | 9 | | | | 3 | | |
| | | | | | | | | 3 |
| 1 | | 2 | | 9 | | | | |
| 7 | 9 | | | 2 | | | 1 | |
| | | | | 4 | | | 3 | |
| 2 | | | | | 8 | | 5 | |
| 8 | | | | | | | | 4 |
- Puzzle ID
LDI0-2a6da44988a98d0cb4e506f7ba4f349b22c67c7b- Clue count
- 23
- Unique solution
- Verified
- LDI v0 score
- 27
- Tier
- Hard
- Hardest technique
- Hidden Single
- Logical steps
- 58
Verified key step: Hidden Single: place 1 at row 3, column 9.
Expert
| | 1 | | 3 | 7 | | 4 | 9 | |
| | | | 2 | | | | | |
| 3 | | | | | | 8 | | 2 |
| | | | | | 1 | 9 | | |
| | | 7 | | | 2 | | | 8 |
| 1 | | | 5 | | | | 2 | |
| | 8 | | 4 | | | | | |
| 7 | | | | | | | | 6 |
| 2 | | | | 3 | | | 1 | |
- Puzzle ID
LDI0-2e2017bfbcf79d42a17d8073be24567c017dabc6- Clue count
- 24
- Unique solution
- Verified
- LDI v0 score
- 68
- Tier
- Expert
- Hardest technique
- Hidden Pair
- Logical steps
- 62
Verified key step: Naked Single: place 5 at row 1, column 9.
2026-07-31 · LDI v0
Play this dated challenge
LDI v0
Verified puzzle facts
- Puzzle ID
LDI0-160237f2bdbd41d299d7e553bdb5415d8837e360- LDI score (0–100)
- 9
- Clue count
- 26
- Logical steps
- 55
- Hardest technique
- Hidden Single
Clue count is a board fact, not the difficulty verdict. The tier comes from this published LDI version.