6
1
5
3
9
6
2
4
1
7
3
2
4
2
9
7
5
1
9
5
7
3
2
1
2
9
3
7
8
Time 00:00
Mistakes 0
Ready
Expert Sudoku #220
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 29 of 81 |
| Technique score | 64 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 8, column 1 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.