2
4
6
8
3
1
9
5
3
4
7
6
5
2
1
1
8
7
7
5
9
9
6
8
7
Time 00:00
Mistakes 0
Ready
Expert Sudoku #86
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 25 of 81 |
| Technique score | 49.1 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 4, column 4 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.