7
9
4
4
2
8
9
7
5
8
6
3
6
2
9
4
6
5
3
1
9
7
2
8
3
Time 00:00
Mistakes 0
Ready
Medium Sudoku #209
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 25 of 81 |
| Technique score | 99.4 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 7, column 1 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.