8
7
5
4
5
4
8
1
6
8
7
7
1
3
5
6
7
7
3
2
6
6
4
3
1
9
2
Time 00:00
Mistakes 0
Ready
Expert Sudoku #69
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 34 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 7, column 9 already sees all eight other digits in its row, column and box, so it can only be 1.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.