2
5
4
3
5
8
3
1
6
8
4
4
2
6
8
5
9
3
1
7
9
8
7
4
1
Time 00:00
Mistakes 0
Ready
Hard Sudoku #110
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 25 of 81 |
| Technique score | 131.5 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 1, column 5 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.