3
2
3
8
5
7
5
4
9
8
8
1
6
7
5
4
7
8
5
5
6
2
7
9
1
3
Time 00:00
Mistakes 0
Ready
Hard Sudoku #180
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 26 of 81 |
| Technique score | 105.8 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 8, column 4 already sees all eight other digits in its row, column and box, so it can only be 2.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.