6
3
4
1
5
7
3
4
9
1
8
1
6
4
3
7
5
2
6
1
7
8
6
3
4
2
1
7
1
Time 00:00
Mistakes 0
Ready
Expert Sudoku #13
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 29 of 81 |
| Technique score | 39.2 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 6, column 9 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.