4
6
7
3
3
6
1
5
4
2
5
3
7
6
4
9
5
9
3
6
3
6
5
9
4
1
6
8
7
Time 00:00
Mistakes 0
Ready
Easy Sudoku #27
Solvable by scanning alone — naked and hidden singles. A calm warm-up.
| Difficulty | Easy |
| Clues given | 29 of 81 |
| Technique score | 87.2 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 8, column 3 already sees all eight other digits in its row, column and box, so it can only be 2.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.