4
7
5
8
2
6
7
5
1
1
2
5
9
8
3
9
4
6
5
1
9
8
6
2
4
4
5
Time 00:00
Mistakes 0
Ready
Easy Sudoku #170
Solvable by scanning alone — naked and hidden singles. A calm warm-up.
| Difficulty | Easy |
| Clues given | 27 of 81 |
| Technique score | 90.6 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 1, column 8 already sees all eight other digits in its row, column and box, so it can only be 3.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.