8
9
6
7
3
3
5
4
6
2
3
7
8
6
5
9
9
8
7
6
8
9
5
1
3
7
4
Time 00:00
Mistakes 0
Ready
Hard Sudoku #211
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 27 of 81 |
| Technique score | 132.3 |
| Rated techniques | 7 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 6 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.