8
7
4
5
3
4
9
4
6
9
7
5
5
8
2
6
5
2
1
2
4
9
5
7
8
1
5
4
6
Time 00:00
Mistakes 0
Ready
Hard Sudoku #4
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 29 of 81 |
| Technique score | 125.9 |
| Rated techniques | 7 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 6 already sees all eight other digits in its row, column and box, so it can only be 8.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.