5
7
2
7
1
2
5
1
6
2
7
3
8
6
9
9
1
8
4
1
1
3
2
2
9
4
Time 00:00
Mistakes 0
Ready
Medium Sudoku #170
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 26 of 81 |
| Technique score | 98 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 5, column 5 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.