6
9
8
7
8
4
2
5
2
3
1
2
9
4
4
2
1
9
7
6
4
7
5
7
3
9
8
2
1
6
7
1
2
Time 00:00
Mistakes 0
Ready
Expert Sudoku #219
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 33 of 81 |
| Technique score | 61.2 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 6, 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.