8
2
9
1
6
9
6
4
8
2
6
1
3
6
8
4
1
5
7
9
3
2
1
5
7
3
4
7
8
Time 00:00
Mistakes 0
Ready
Medium Sudoku #20
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 29 of 81 |
| Technique score | 105.2 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 5, 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.