7
4
1
7
4
6
3
4
8
9
5
2
4
2
3
2
8
1
8
4
1
3
8
4
6
7
7
6
3
1
6
5
Time 00:00
Mistakes 0
Ready
Hard Sudoku #46
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 32 of 81 |
| Technique score | 93.8 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 1 already sees all eight other digits in its row, column and box, so it can only be 6.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.