4
3
2
4
7
7
3
1
5
6
8
9
1
2
6
8
3
9
5
6
9
8
7
9
1
3
7
Time 00:00
Mistakes 0
Ready
Easy Sudoku #221
Solvable by scanning alone — naked and hidden singles. A calm warm-up.
| Difficulty | Easy |
| Clues given | 27 of 81 |
| Technique score | 96.6 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 3, 4 can only go in one cell, so it must go there.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.