3
8
8
4
6
2
5
8
1
3
2
7
8
9
5
6
2
1
2
3
6
9
7
3
7
8
7
1
Time 00:00
Mistakes 0
Ready
Expert Sudoku #222
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 87 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 8 already sees all eight other digits in its row, column and box, so it can only be 4.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.