8
9
4
3
7
6
3
1
4
2
3
7
8
5
7
9
3
9
4
6
1
2
7
3
4
5
1
6
Time 00:00
Mistakes 0
Ready
Expert Sudoku #80
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 57.1 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 2, column 2 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.