7
5
9
2
3
4
7
6
1
2
3
4
5
6
8
1
3
9
5
1
4
7
9
2
8
1
3
5
8
9
5
3
1
Time 00:00
Mistakes 0
Ready
Easy Sudoku #153
Solvable by scanning alone — naked and hidden singles. A calm warm-up.
| Difficulty | Easy |
| Clues given | 33 of 81 |
| Technique score | 79.5 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 2, column 4 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.