8
5
7
2
4
1
4
7
8
2
6
6
5
3
2
7
1
8
3
1
9
7
6
3
4
2
9
7
Time 00:00
Mistakes 0
Ready
Easy Sudoku #215
Solvable by scanning alone — naked and hidden singles. A calm warm-up.
| Difficulty | Easy |
| Clues given | 28 of 81 |
| Technique score | 87.1 |
| Rated techniques | 2 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 1, column 1 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.