4
3
7
5
1
8
3
8
6
1
6
2
8
5
3
9
1
7
8
6
2
9
6
7
3
9
8
4
Time 00:00
Mistakes 0
Ready
Medium Sudoku #229
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 28 of 81 |
| Technique score | 151.6 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 7 already sees all eight other digits in its row, column and box, so it can only be 9.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.