9
1
3
4
3
6
8
9
1
9
5
1
8
6
9
2
4
5
6
4
5
8
3
2
7
1
6
3
Time 00:00
Mistakes 0
Ready
Hard Sudoku #41
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 28 of 81 |
| Technique score | 103.3 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 7, column 3 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.