3
8
7
2
4
7
2
1
7
3
8
9
7
2
5
1
2
6
4
9
7
5
8
4
2
5
3
Time 00:00
Mistakes 0
Ready
Expert Sudoku #151
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 27 of 81 |
| Technique score | 31.3 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 8, column 3 already sees all eight other digits in its row, column and box, so it can only be 1.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.