4
7
7
5
1
5
9
8
5
6
2
4
6
9
8
3
3
7
9
8
9
3
4
8
1
2
Time 00:00
Mistakes 0
Ready
Medium Sudoku #177
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 26 of 81 |
| Technique score | 91.1 |
| Rated techniques | 2 |
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 1.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.