6
4
7
3
8
6
9
8
5
8
4
7
7
8
1
4
3
7
2
7
2
3
1
5
4
9
6
5
Time 00:00
Mistakes 0
Ready
Hard Sudoku #61
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 28 of 81 |
| Technique score | 112 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 9, column 7 already sees all eight other digits in its row, column and box, so it can only be 7.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.