5
1
6
2
5
3
7
9
4
7
7
6
1
8
9
2
3
8
6
2
9
8
4
1
Time 00:00
Mistakes 0
Ready
Hard Sudoku #190
Advanced patterns: X-Wings, triples and tighter candidate logic.
| Difficulty | Hard |
| Clues given | 24 of 81 |
| Technique score | 122.4 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this column 5, 1 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.