4
2
2
5
6
7
8
3
2
4
9
1
2
4
8
6
5
3
1
6
9
3
8
5
4
7
Time 00:00
Mistakes 0
Ready
Expert Sudoku #18
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 26 of 81 |
| Technique score | 93.5 |
| Rated techniques | 8 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 2, column 6 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.