3
4
6
5
6
1
9
4
3
8
5
7
3
4
7
2
2
9
1
4
8
4
5
2
7
6
4
9
3
Time 00:00
Mistakes 0
Ready
Expert Sudoku #188
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 29 of 81 |
| Technique score | 18 |
| Rated techniques | 3 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 6, column 1 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.