1
8
9
4
5
2
9
3
6
2
7
7
8
2
1
7
3
1
4
5
7
3
8
9
4
Time 00:00
Mistakes 0
Ready
Medium Sudoku #21
You will want pencil marks: locked candidates, pairs and triples.
| Difficulty | Medium |
| Clues given | 25 of 81 |
| Technique score | 106 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 4, 1 can only go in one cell, so it must go there.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.