7
2
3
5
4
4
3
1
5
2
2
6
3
2
4
1
9
8
4
3
7
1
2
9
6
4
5
8
4
7
2
1
Time 00:00
Mistakes 0
Ready
Expert Sudoku #209
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 32 of 81 |
| Technique score | 45.7 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 8, column 2 already sees all eight other digits in its row, column and box, so it can only be 3.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.