2
7
4
8
7
1
3
8
9
2
7
1
8
2
9
7
4
2
3
9
1
5
1
6
5
2
9
Time 00:00
Mistakes 0
Ready
Expert Sudoku #207
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 40.2 |
| Rated techniques | 3 |
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.