1
6
9
5
8
1
4
8
1
9
1
7
8
2
9
5
4
6
3
2
4
6
2
3
3
6
1
7
Time 00:00
Mistakes 0
Ready
Expert Sudoku #23
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 28 of 81 |
| Technique score | 59 |
| Rated techniques | 6 |
Techniques this puzzle needs
Where to start
The first move on this board is a Naked Single: Row 5, column 9 already sees all eight other digits in its row, column and box, so it can only be 4.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.