5
9
2
5
7
1
2
3
5
4
6
5
9
1
4
7
7
6
8
3
4
9
5
9
7
4
5
2
Time 00:00
Mistakes 0
Ready
Expert Sudoku #101
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 71 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 4, 7 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.