4
8
1
6
5
9
7
1
1
3
6
4
1
2
9
4
6
2
3
6
4
7
5
6
1
5
3
7
8
7
3
6
5
3
6
2
4
5
3
9
Time 00:00
Mistakes 0
Ready
Easy Sudoku #117
Solvable by scanning alone — naked and hidden singles. A calm warm-up.
| Difficulty | Easy |
| Clues given | 40 of 81 |
| Technique score | 63.1 |
| Rated techniques | 2 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 4, column 1 already sees all eight other digits in its row, column and box, so it can only be 7.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.