9
7
6
3
4
4
5
7
3
2
7
8
6
3
5
2
8
8
1
5
6
4
7
9
2
Time 00:00
Mistakes 0
Ready
Hard Sudoku #94
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 25 of 81 |
| Technique score | 144.3 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 7, column 1 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.