9
2
1
7
1
9
3
8
3
4
1
8
5
9
7
6
1
9
2
4
1
9
3
5
2
Time 00:00
Mistakes 0
Ready
Hard Sudoku #64
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 25 of 81 |
| Technique score | 110.5 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 3, 1 can only go in one cell, so it must go there.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.