9
1
7
5
8
3
1
8
2
9
6
1
1
7
5
3
6
4
2
9
8
1
3
6
4
5
2
Time 00:00
Mistakes 0
Ready
Expert Sudoku #17
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 38.8 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 9, column 7 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.