8
3
2
2
7
9
4
1
3
4
7
6
9
1
8
5
4
2
6
8
1
7
5
6
2
4
8
Time 00:00
Mistakes 0
Ready
Expert Sudoku #228
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 40.2 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 9, column 5 already sees all eight other digits in its row, column and box, so it can only be 9.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.