7
2
8
2
1
7
5
1
9
9
7
3
6
5
2
4
1
3
2
9
7
6
5
9
3
7
8
7
1
3
5
Time 00:00
Mistakes 0
Ready
Easy Sudoku #57
Solvable by scanning alone — naked and hidden singles. A calm warm-up.
| Difficulty | Easy |
| Clues given | 31 of 81 |
| Technique score | 85.9 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 4, column 5 already sees all eight other digits in its row, column and box, so it can only be 8.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.