9
4
2
8
6
9
8
9
7
5
6
2
9
6
8
1
3
7
1
3
9
1
6
8
5
1
4
6
3
Time 00:00
Mistakes 0
Ready
Expert Sudoku #99
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 29 of 81 |
| Technique score | 28.4 |
| Rated techniques | 2 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 8, 1 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.