7
5
4
4
8
6
3
7
1
7
4
8
3
2
9
6
9
5
6
8
1
3
6
2
5
Time 00:00
Mistakes 0
Ready
Hard Sudoku #230
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 25 of 81 |
| Technique score | 109.1 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 7, 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.