9
5
8
4
1
8
4
3
7
9
5
3
4
5
5
2
7
4
9
6
7
3
2
8
5
7
1
Time 00:00
Mistakes 0
Ready
Expert Sudoku #103
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 27.5 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 7, column 2 already sees all eight other digits in its row, column and box, so it can only be 8.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.