2
3
1
7
9
3
7
6
2
8
9
2
3
1
5
7
4
2
9
3
5
4
8
2
6
3
4
Time 00:00
Mistakes 0
Ready
Expert Sudoku #217
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 56.8 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 8, column 9 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.