3
1
8
8
3
9
2
4
3
5
4
2
3
6
9
1
8
5
8
3
3
9
4
7
4
3
6
4
1
Time 00:00
Mistakes 0
Ready
Expert Sudoku #55
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 29 of 81 |
| Technique score | 18.7 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 4, column 6 already sees all eight other digits in its row, column and box, so it can only be 7.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.