8
1
2
5
4
7
9
6
2
9
1
3
7
4
3
1
7
7
6
2
3
8
4
5
7
Time 00:00
Mistakes 0
Ready
Expert Sudoku #204
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 25 of 81 |
| Technique score | 20.6 |
| Rated techniques | 3 |
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.