2
7
4
3
7
3
4
3
1
2
1
7
9
4
2
3
7
8
4
9
5
1
8
3
5
1
9
2
Time 00:00
Mistakes 0
Ready
Expert Sudoku #167
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 45.3 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 2, 2 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.