9
4
8
3
2
2
6
5
8
9
4
1
6
2
9
5
8
8
4
7
2
9
9
7
7
2
5
Time 00:00
Mistakes 0
Ready
Medium Sudoku #158
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 27 of 81 |
| Technique score | 100.5 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 2, column 3 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.