1
5
4
9
3
2
7
7
8
3
8
4
2
5
6
9
3
4
2
3
6
7
3
4
1
3
9
9
4
7
Time 00:00
Mistakes 0
Ready
Medium Sudoku #42
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 30 of 81 |
| Technique score | 93.9 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 2, column 4 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.