4
1
9
8
3
6
5
6
5
9
4
4
5
3
6
2
8
9
6
2
3
7
5
9
4
3
7
Time 00:00
Mistakes 0
Ready
Expert Sudoku #130
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 23.9 |
| 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 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.