1
5
8
8
7
3
2
8
1
7
9
5
9
8
5
2
8
4
4
2
6
6
3
2
8
7
Time 00:00
Mistakes 0
Ready
Hard Sudoku #236
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 26 of 81 |
| Technique score | 124.2 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 4, column 7 already sees all eight other digits in its row, column and box, so it can only be 6.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.