9
4
3
4
6
5
8
7
9
2
8
2
9
7
8
1
3
8
2
1
6
5
6
5
1
9
5
2
7
Time 00:00
Mistakes 0
Ready
Expert Sudoku #19
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 29 of 81 |
| Technique score | 56.7 |
| Rated techniques | 8 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 5 already sees all eight other digits in its row, column and box, so it can only be 3.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.