5
9
6
4
5
7
7
2
9
9
5
3
8
9
3
4
1
8
5
9
8
4
3
1
8
2
4
1
Time 00:00
Mistakes 0
Ready
Expert Sudoku #155
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 37.6 |
| Rated techniques | 2 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 2, 9 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.