1
4
4
8
5
7
1
5
4
2
3
8
3
1
6
4
9
7
2
5
2
9
3
6
2
5
Time 00:00
Mistakes 0
Ready
Hard Sudoku #149
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 26 of 81 |
| Technique score | 112.7 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 5, column 5 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.