7
4
1
5
2
2
5
8
9
6
4
6
7
6
3
8
7
5
9
7
2
1
3
3
7
5
6
2
7
9
Time 00:00
Mistakes 0
Ready
Medium Sudoku #136
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 30 of 81 |
| Technique score | 87.9 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 1, column 7 already sees all eight other digits in its row, column and box, so it can only be 8.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.