3
1
7
8
5
2
4
3
1
9
6
7
5
1
2
6
5
8
4
5
5
1
3
6
Time 00:00
Mistakes 0
Ready
Expert Sudoku #171
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 24 of 81 |
| Technique score | 57.5 |
| Rated techniques | 5 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 4, 5 can only go in one cell, so it must go there.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.