9
7
6
1
6
7
4
6
5
2
4
6
3
3
4
8
9
7
3
2
8
1
4
1
2
1
8
5
Time 00:00
Mistakes 0
Ready
Expert Sudoku #47
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 16 |
| Rated techniques | 2 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 3, 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.