4
6
1
3
3
7
2
4
6
9
6
3
7
5
1
7
4
6
1
8
2
3
2
9
2
7
8
6
Time 00:00
Mistakes 0
Ready
Easy Sudoku #20
Solvable by scanning alone — naked and hidden singles. A calm warm-up.
| Difficulty | Easy |
| Clues given | 28 of 81 |
| Technique score | 94 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 7 already sees all eight other digits in its row, column and box, so it can only be 5.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.