8
5
2
1
4
3
9
3
8
4
9
5
3
6
9
7
4
1
7
6
1
4
4
9
5
8
3
1
Time 00:00
Mistakes 0
Ready
Medium Sudoku #54
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 28 of 81 |
| Technique score | 103 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 1 already sees all eight other digits in its row, column and box, so it can only be 7.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.