4
2
9
8
9
1
4
7
8
5
2
9
1
3
6
2
4
7
3
2
8
2
9
1
9
7
5
6
Time 00:00
Mistakes 0
Ready
Expert Sudoku #83
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 44.2 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 8, column 4 already sees all eight other digits in its row, column and box, so it can only be 6.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.