8
7
9
5
4
5
3
8
4
8
2
8
9
7
6
3
7
5
5
2
9
7
7
6
3
9
4
5
Time 00:00
Mistakes 0
Ready
Expert Sudoku #81
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 45.1 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 4 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.