8
2
7
2
8
6
4
1
9
7
6
3
8
4
2
5
3
9
3
4
7
3
5
1
9
7
2
Time 00:00
Mistakes 0
Ready
Expert Sudoku #133
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 49.1 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 1 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.