7
9
1
4
8
4
1
6
2
6
2
5
3
4
9
8
1
7
8
9
6
3
7
6
3
Time 00:00
Mistakes 0
Ready
Medium Sudoku #99
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 25 of 81 |
| Technique score | 104.5 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 4, column 1 already sees all eight other digits in its row, column and box, so it can only be 3.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.