8
9
4
5
4
7
9
5
4
3
2
8
2
9
8
6
3
1
6
4
2
7
3
3
8
6
2
9
4
Time 00:00
Mistakes 0
Ready
Expert Sudoku #172
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 29 of 81 |
| Technique score | 68.8 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 3, column 1 already sees all eight other digits in its row, column and box, so it can only be 7.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.