8
3
6
4
6
7
9
4
3
9
6
6
7
7
4
5
1
2
2
8
9
1
7
5
2
8
6
Time 00:00
Mistakes 0
Ready
Hard Sudoku #151
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 27 of 81 |
| Technique score | 131.1 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 3, 6 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.