9
5
2
7
3
8
7
3
6
4
7
5
4
5
9
6
8
7
4
8
1
6
1
2
4
3
5
Time 00:00
Mistakes 0
Ready
Expert Sudoku #231
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 40.6 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 9, column 8 already sees all eight other digits in its row, column and box, so it can only be 9.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.