5
2
3
4
1
6
5
8
2
7
2
9
4
6
7
1
5
9
4
6
8
2
7
2
6
3
5
4
Time 00:00
Mistakes 0
Ready
Expert Sudoku #56
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 66.1 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 2, column 1 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.