5
7
6
4
2
4
1
9
8
1
2
4
1
7
6
2
9
8
1
4
3
9
4
2
1
4
5
2
6
7
9
2
9
2
1
3
Time 00:00
Mistakes 0
Ready
Medium Sudoku #25
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 36 of 81 |
| Technique score | 83.7 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 1, column 4 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.